Questions

Q:

For a certain reaction,DGq = -45 kJ/mol and DHq= -90 kJ/mol at 0°C. What is the minimum temperature at which the reaction will become spontaneous, ifDHq and DSq are independent of temperature?

A) 273 K B) 298 K
C) 546 K D) 596 K
 
Answer & Explanation Answer: C) 546 K

Explanation:

T = 273 °K

Using the formula,

DGq = DHq –TDS

-45 = -90 –273 DS

DS = 0.164

Now since DHq and DSq are independent,T2= DH/DS = 45/0.164 = 273°K

Required Temp = 273 + 273 = 546°K

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Q:

If price of an article decreases from Rs 240 to Rs 220, when quantity demanded increases from 200 units to 210 units. Find point elasticity of demand?

A) 0.6 B) -1.8
C) -0.6 D) 1.8
 
Answer & Explanation Answer: C) -0.6

Explanation:
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Q:

Which of the following cannot be beaten into Sheets?

A) Gold B) Silver
C) Potassium D) Aluminum
 
Answer & Explanation Answer: C) Potassium

Explanation:
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Q:

What is the term for classifying and grouping organisms?

A) Homology B) Taxonomy
C) Biology D) Zeology
 
Answer & Explanation Answer: B) Taxonomy

Explanation:

The term for classifying and grouping organisms is Taxonomy. It is the science of defining and naming groups of biological organisms on the basis of shared characteristics.

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Q:

The magnitude of buoyant force depends on the .......... of the fluid.

A) mass B) temperature
C) volume D) density
 
Answer & Explanation Answer: D) density

Explanation:
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Q:

The first Indian communication satellite was

A) Aryabhatta B) Bhaskara-I
C) Apple D) Chandrayaan-I
 
Answer & Explanation Answer: C) Apple

Explanation:
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Q:

Which organ does detoxification and produces chemicals needed for digestion?

A) Salivary glands B) Pancreas
C) Thyroid gland D) Liver
 
Answer & Explanation Answer: D) Liver

Explanation:
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Filed Under: Biology
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Q:

Monazite is an ore of

A) Platinum B) Radium
C) Uranium D) Lanthanum
 
Answer & Explanation Answer: D) Lanthanum

Explanation:

Monazite is an ore of cerium, thorium and lanthanum.

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Filed Under: Chemistry
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