308
Q:

Hydrogen bomb is based on the principle of  

A) nuclear fission B) nuclear fusion
C) natural radioactivity D) artificial radioactivity

Answer:   B) nuclear fusion



Explanation:

Hydrogen Bomb is based on the principle of nuclear fusion. Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles. The difference in mass between the reactants and products is manifested as either the release or absorption of energy.

Subject: Chemistry
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Q:

Which bond has the greatest ionic character?

A) H-F B) H-Cl
C) H-N D) H-O
 
Answer & Explanation Answer: A) H-F

Explanation:

Ionic character depends on the electronegativity difference between the bonding elements. The greatest the elctronegativity diffference the greatest the ionic character.

Here in the given options, H-F has has the greatest ionic character. The electronegativity of Hydrogen is 2.1 and that of Fluorine is 4. Now the electronegativity difference is 4 - 2.1 = 1.9.

 

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0 1
Q:

What is the value of triple point (solid, liquid and gas) of Water?

A) 273.16° C B) -273.16 K
C) 273.16 K D) 0° C
 
Answer & Explanation Answer: C) 273.16 K

Explanation:

The temperature at which a substance can exist in equilibrium in the liquid, solid, and gaseous states. The triple point of pure water is at 0.01°C (273.16K, 32.01°F).

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0 20
Q:

Which metal pollute the air of a big city?

A) Chromium B) Lead
C) Copper D) Zinc
 
Answer & Explanation Answer: B) Lead

Explanation:
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Q:

What is a normal pH level in blood?

A) 7.35 - 7.45 B) 7.45 - 7.55
C) 7.6 - 7.7 D) 7 - 7.10
 
Answer & Explanation Answer: A) 7.35 - 7.45

Explanation:
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1 9
Q:

Which compound is an electrolyte?

A) HCl B) NaCl
C) HBr D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A substance that dissociates into ions in solution and acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, and phosphate are examples of electrolytes, informally known as lytes.

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1 44
Q:

Through which conversion is energy released?

A) CO2 and H2O to C6H12O6 and O2 B) NADP+ to NADPH
C) ADP to ATP D) ATP to ADP
 
Answer & Explanation Answer: D) ATP to ADP

Explanation:
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3 39
Q:

Which gas is used in tube light?

A) Oxygen B) Hydrogen
C) Neon D) Nitric oxide
 
Answer & Explanation Answer: C) Neon

Explanation:
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2 99
Q:

Alcohol is a stimulant. true or false

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Alcohol is a drug.

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