1
Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases

Answer:   D)  size and ionisation energy of an atom increases



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
Q:

The element gold occurs in which period?

A) 11 B) 5
C) 6 D) 7
 
Answer & Explanation Answer: C) 6

Explanation:

The chemical element gold has an atomic number 79 is present in period 6 and group 11 of the periodic table.

The_element_gold1551271023.png image

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Q:

The process of conversion of sugar to alcohol is called

A) Moulding B) Infection
C) Fermentation D) Alcohol fixation
 
Answer & Explanation Answer: C) Fermentation

Explanation:

The process of conversion of sugar to alcohol is called Fermentation in which sugar is coverted to alcohol with the help of yeast.

yeasts11551269935.png image

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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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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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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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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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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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