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Q:

If $x^{1 / 4} + x^{- 1 / 4} = 2$ , then what is the value of $x^{81} + (1 / x^{81})$ ?

A) -2	B) 0
C) 1	D) 2

Answer & Explanation Answer: D) 2

Explanation:

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Filed Under: Simplification
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Q:

If $(x^{2} / yz) + (y^{2} / zx) + (z^{2} / xy) = 3$ , then what is the value of ${(x + y + z)}^{3}$ ?

A) 0	B) 1
C) 2	D) 3

Answer & Explanation Answer: A) 0

Explanation:

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Q:

Which of the following substances cause temporary hardness in water?

1. Mg(HCO3)2

2. Ca(HCO3)2

3. CaCl2

4. MgSO4

A) 3 and 4	B) 2and 3
C) 1 and 4	D) 1 and 2

Answer & Explanation Answer: D) 1 and 2

Explanation:

There are two types of water hardness: temporary and permanent hardness. Temporary hardness is due to the presence of calcium hydrogen carbonate Ca(HCO3)2(aq) and magnesium hydrogen carbonate Mg(HCO3)2(aq).

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Filed Under: Chemistry
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Q:

Which one of the following places of India experiences highest atmospheric pressure during winter?

A) Jaisalmer	B) Leh
C) Chennai	D) Guwahati

Answer & Explanation Answer: B) Leh

Explanation:

As temperature of Leh will be lowest during winters from the given options, the highest pressure will be at Leh.

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Filed Under: Indian Geography
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Q:

Which one of the following is applicable to collision-coalescence process of precipitation?

A) Clouds which do not extend beyond the freezing level	B) Clouds which extend beyond the freezing level
C) All types of clouds	D) Cirrocumulus cloud

Answer & Explanation Answer: A) Clouds which do not extend beyond the freezing level

Explanation:

In colder clouds: droplets formed by Bergeron mechanism. But, in many parts of the world the air is too warm for ice crystals to form. This being the case, rain and snow cannot develop following the Bergeron Process. Instead, tiny droplets form as they collide into one another creating larger and larger droplet, this is known as collision-coalescence process. So, warmer clouds are associated with this keyword.

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Filed Under: Physics
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Q:

Which of the following causes adiabatic temperature changes in atmosphere?

A) Deflection and advection	B) Latent heat of condensation
C) Expansion and compression of the air	D) Partial absorption of solar radiation by the atmosphere

Answer & Explanation Answer: C) Expansion and compression of the air

Explanation:

Application of temperature changes in the atmosphere is in adiabatics, or temperature change which are caused by compressing or allowing air to expand.

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Filed Under: Physics
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Q:

A protein is synthesized in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membrane layers it has to pass to reach its destination?

A) 2	B) 3
C) 4	D) 5

Answer & Explanation Answer: B) 3

Explanation:

There are 3 double-layered membrane layers, which the protein has to pass to reach its destination.

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Filed Under: Biology
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Q:

Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?

A) Euglena : Flagellum	B) Paramecium : Cilia
C) Nereis : Pseudopodia	D) Starfish : Tubefeet

Answer & Explanation Answer: C) Nereis : Pseudopodia

Explanation:

Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor.

The paramecium uses its cilia to sweep the food along with some water into the cell mouth after it falls into the oral groove.

The underside of the starfish is covered with hundreds of tube feet, which it uses for walking around, for attaching tightly to rocks, and for holding on to prey.

Nereis possess setae and parapodia for locomotion

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Filed Under: Biology
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