BPSC TRE 4 General Science practice set 2

Que: (1). Ginger is an underground stem and not a root because

Asked in BPSC TRE 2.0
A.
B.
C.
D.
E.
Open question page

Que: (2). Which type of modified stem is found in ginger?

B.
C.
A.
D.
E.
Open question page

Que: (3). Which of the following is an example of a stem tuber?

A.
B.
C.
D.
E.
Open question page

Que: (4). The eyes of a potato represent

A.
C.
B.
D.
E.
Open question page

Que: (5). Which of the following is a modified underground stem?

A.
B.
C.
D.
E.
Open question page

Que: (6). Which plant has a bulb as a modified underground stem?

B.
C.
A.
D.
E.
Open question page

Que: (7). Which of the following is a modified root used for food storage?

B.
C.
A.
D.
E.
Open question page

Que: (8). Which feature is characteristic of a stem rather than a typical root?

A.
B.
C.
D.
E.
Open question page

Que: (9). Which underground stem is characterized by a horizontal growth habit and distinct nodes and internodes?

C.
B.
A.
D.
E.
Open question page

Que: (10). Which of the following is an example of a runner, a modified stem?

C.
B.
A.
D.
E.
Open question page

Que: (11). Which of the following pairs is correctly matched?

B.
A.
C.
D.
E.
Open question page

Que: (12). The focal length of a convex lens is fL = 10 cm. On immersing in water, it will act as a

Asked in BPSC TRE 2.0
C.
B.
A.
D.
E.
Open question page

Que: (13). When a convex lens is immersed in a liquid having the same refractive index as the lens material, it will

B.
C.
A.
D.
E.
Open question page

Que: (14). The power of a convex lens of focal length 50 cm is

B.
C.
A.
D.
E.
Open question page

Que: (15). A lens has a focal length of 25 cm. Its power is

B.
C.
A.
D.
E.
Open question page

Que: (16). Which type of lens is used to correct myopia?

C.
B.
A.
D.
E.
Open question page

Que: (17). Which type of lens is used to correct hypermetropia?

C.
B.
A.
D.
E.
Open question page

Que: (18). If the focal length of a convex lens is decreased, its power will

B.
A.
C.
D.
E.
Open question page

Que: (19). The SI-related practical unit of power of a lens is

A.
C.
B.
D.
E.
Open question page

Que: (20). A convex lens has a focal length of 20 cm. Its power is

B.
A.
C.
D.
E.
Open question page

Que: (21). When a convex lens is placed in a medium with a refractive index closer to that of the lens than air, its focal length generally

A.
C.
B.
D.
E.
Open question page

Que: (22). Which statement about a concave lens in air is correct?

A.
C.
B.
D.
E.
Open question page

Que: (23). Though water is transparent to visible light, it is not possible to see distant objects in fog which consists of fine drops of water. This is so because

Asked in BPSC TRE 2.0
A.
C.
B.
D.
E.
Open question page

Que: (24). The blue colour of the sky is mainly due to

A.
B.
C.
D.
E.
Open question page

Que: (25). The reddish appearance of the Sun near the horizon is mainly due to

C.
A.
B.
D.
E.
Open question page

Que: (26). Why are danger signals generally red in colour?

B.
C.
A.
D.
E.
Open question page

Que: (27). The phenomenon responsible for the blue colour of the sky is

C.
A.
B.
D.
E.
Open question page

Que: (28). Which phenomenon makes the path of a light beam visible when it passes through smoke?

C.
A.
B.
D.
E.
Open question page

Que: (29). The Tyndall effect is related to

A.
C.
B.
D.
E.
Open question page

Que: (30). Stars appear to twinkle mainly because of

A.
C.
B.
D.
E.
Open question page

Que: (31). The Sun appears flattened near the horizon mainly because of

A.
C.
B.
D.
E.
Open question page

Que: (32). Why does the sky appear comparatively dark to an astronaut in outer space?

B.
C.
A.
D.
E.
Open question page

Que: (33). Which phenomenon is primarily responsible for the apparent visibility of a light beam in a dusty room?

C.
A.
B.
D.
E.
Open question page

Que: (34). Monochromatic light enters from one medium to the other. Which one of the following properties does not change?

Asked in BPSC TRE 2.0
C.
A.
B.
D.
E.
Open question page

Que: (35). When light passes from air into glass, which quantity remains unchanged?

C.
B.
A.
D.
E.
Open question page

Que: (36). When light enters a denser medium from a rarer medium, its speed generally

A.
B.
C.
D.
E.
Open question page

Que: (37). When light enters glass from air, its wavelength generally

B.
C.
A.
D.
E.
Open question page

Que: (38). The frequency of light is determined by the

C.
A.
B.
D.
E.
Open question page

Que: (39). A light wave has a frequency of 6 × 10^14 Hz in air. Its frequency in glass will be

B.
A.
C.
D.
E.
Open question page

Que: (40). The speed of light in vacuum is approximately

C.
A.
B.
D.
E.
Open question page

Que: (41). The refractive index of a medium is defined as the ratio of

A.
C.
B.
D.
E.
Open question page

Que: (42). If the refractive index of glass is 1.5, the speed of light in glass is approximately

C.
A.
B.
D.
E.
Open question page

Que: (43). If the frequency of a light wave is 5 × 10^14 Hz and its speed in a medium is 2 × 10^8 m/s, its wavelength is

A.
C.
B.
D.
E.
Open question page

Que: (44). When monochromatic light passes from one transparent medium to another, which pair of quantities generally changes?

C.
B.
A.
D.
E.
Open question page

Que: (45). The speed of an electron in the orbit of the hydrogen atom in the ground state is

Asked in BPSC TRE 2.0
A.
C.
B.
D.
E.
Open question page

Que: (46). According to the Bohr model, the speed of an electron in the nth orbit of a hydrogen atom is proportional to

B.
C.
A.
D.
E.
Open question page

Que: (47). If the speed of an electron in the first orbit of hydrogen is c/137, its speed in the second orbit is

C.
B.
A.
D.
E.
Open question page

Que: (48). The approximate value of the fine-structure constant is

A.
B.
C.
D.
E.
Open question page

Que: (49). The speed of light in vacuum is approximately how many times the speed of an electron in the first Bohr orbit of hydrogen?

A.
B.
C.
D.
E.
Open question page

Que: (50). In the Bohr model of hydrogen, the angular momentum of the electron in the nth orbit is

C.
A.
B.
D.
E.
Open question page

Que: (51). The radius of the nth Bohr orbit of a hydrogen atom is proportional to

B.
A.
C.
D.
E.
Open question page

Que: (52). The energy of an electron in the nth orbit of a hydrogen atom is proportional to

A.
B.
C.
D.
E.
Open question page

Que: (53). The energy of an electron in the ground state of hydrogen atom is

C.
B.
A.
D.
E.
Open question page

Que: (54). The speed of an electron in the third Bohr orbit of hydrogen is approximately

B.
C.
A.
D.
E.
Open question page

Que: (55). If the electron speed in the first Bohr orbit of hydrogen is approximately 2.19 × 10^6 m/s, its speed in the second orbit is approximately

B.
C.
A.
D.
E.
Open question page

Que: (56). A blackbody radiates energy at the rate of E watt per metre 2 at a high temperature T K. When the temperature is reduced to T/3 K, the radiant energy will be

Asked in BPSC TRE 2.0
A.
B.
C.
D.
E.
Open question page

Que: (57). According to Stefan-Boltzmann law, the radiant energy emitted per unit area per unit time by a blackbody is proportional to

A.
C.
B.
D.
E.
Open question page

Que: (58). If the absolute temperature of a blackbody is doubled, its radiant energy emitted per unit area becomes

C.
B.
A.
D.
E.
Open question page

Que: (59). If the absolute temperature of a blackbody is tripled, its radiant energy emitted per unit area becomes

A.
B.
C.
D.
E.
Open question page

Que: (60). If the temperature of a blackbody is reduced to half its original absolute temperature, its radiant energy becomes

B.
C.
A.
D.
E.
Open question page

Que: (61). A blackbody emits radiant energy at the rate E per unit area at temperature T. At temperature 2T, the rate will be

A.
C.
B.
D.
E.
Open question page

Que: (62). The Stefan-Boltzmann constant is represented by

A.
B.
C.
D.
E.
Open question page

Que: (63). For a perfect blackbody, the emissive power is given by

B.
A.
C.
D.
E.
Open question page

Que: (64). A blackbody has radiant power per unit area E at temperature T. If its temperature becomes T/2, what fraction of the original radiant power per unit area remains?

A.
C.
B.
D.
E.
Open question page

Que: (65). A blackbody emits radiation at rate E at temperature T. At what temperature will its radiation rate become 256E?

B.
A.
C.
D.
E.
Open question page

Que: (66). A blackbody emits radiant energy at rate E at temperature T. If its temperature is reduced to T/4, the new radiant energy rate will be

A.
C.
B.
D.
E.
Open question page

Que: (67). The acid which can destroy the colour of acidic KMnO4 is

Asked in BPSC TRE 2.0
A.
B.
C.
D.
E.
Open question page

Que: (68). Which acid is commonly used as a reducing agent in the reaction with acidified KMnO4?

A.
B.
C.
D.
E.
Open question page

Que: (69). The purple colour of acidified KMnO4 disappears during its reaction with oxalic acid because

A.
B.
C.
D.
E.
Open question page

Que: (70). In acidic medium, the reduction product of permanganate ion MnO4− is

B.
A.
C.
D.
E.
Open question page

Que: (71). The oxidation state of manganese in KMnO4 is

B.
C.
A.
D.
Open question page

Que: (72). In the reaction between acidified KMnO4 and oxalic acid, oxalic acid is

A.
B.
C.
D.
E.
Open question page

Que: (73). Which of the following is a strong oxidising agent in acidic medium?

C.
A.
B.
D.
E.
Open question page

Que: (74). The colour of aqueous potassium permanganate is mainly due to

B.
C.
A.
D.
E.
Open question page

Que: (75). When acidified KMnO4 acts as an oxidising agent, the purple colour disappears when MnO4− is reduced to

C.
B.
A.
D.
E.
Open question page

Que: (76). Which acid is represented by the formula CH3COOH?

B.
C.
A.
D.
E.
Open question page

Que: (77). Which of the following is the formula of oxalic acid?

C.
B.
A.
D.
E.
Open question page

Feature Posts