Questions

Q:

Which of the following is a property of sodium hydroxide?

A) It is insoluble in ether and other Non-polar solvents B) It is slowly soluble in water
C) It has an odor of rotten egg smell D) All the above
 
Answer & Explanation Answer: A) It is insoluble in ether and other Non-polar solvents

Explanation:

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−.

Properties:

1. It is highly soluble in water, and readily absorbs moisture and carbon dioxide from the air.

2. NaOH is insoluble in ether and other non-polar solvents.

3. It is an odorless compound.

 

Uses:

Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner.

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Q:

Atoms have no electric charge because they

A) have same number of electrons and neutrons B) have same number of electrons and protons
C) have same number of protons and neutrons D) have same number of protons, electrons and neutrons
 
Answer & Explanation Answer: B) have same number of electrons and protons

Explanation:

Atoms are composed of three main particles called electrons, protons and neutrons. We know that, the electrons are negatively charged particles whereas protons are positively charged and neutrons have no charge.

 

Hence, as the number of electrons and protons are equal and they are oppositely charged, the atom will have no charge as their charges cancel each other.

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Q:

Which of the following event organised to mark Diwali celebrations, has entered Guinness Book of World Records in 2018?

A) Ayodhya Deepostav B) HarHarGange Deepostav
C) Varanasi Deepostav D) Gange Deepostav
 
Answer & Explanation Answer: A) Ayodhya Deepostav

Explanation:

Ayodhya Deepostav event organised to mark Diwali celebrations in Ayodya town has entered Guinness Book of World Records in 2018.

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Q:

Which statement about a nonpartisan election is true?

A) Most state senators are chosen in this way B) Successful candidates must be identified by party
C) Successful candidates must be nominated by a major party D) Most school and city officers are chosen in this way
 
Answer & Explanation Answer: D) Most school and city officers are chosen in this way

Explanation:

Nonpartisanism is a lack of affiliation with or bias toward a political party.

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Q:

Atrophy is a condition that occurs when

A) muscle decreases in size and function because of disease or trauma B) carbon dioxide, lactic acid, and other wastes accumulate in the muscle
C) increased use of skeletal muscle causes an increase in its strength D) the tendons that attach muscle to bone become stretched or injured
 
Answer & Explanation Answer: A) muscle decreases in size and function because of disease or trauma

Explanation:
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Q:

Different forms of genes are called

A) Genomes B) Allele
C) Genotypes D) None of the above
 
Answer & Explanation Answer: B) Allele

Explanation:
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Q:

What is the Budgetary allocation to the Pradhan Mantri Gram Sadak Yojana in 2019?

A) Rs 25,000 Crores B) Rs 19,000 Crores
C) Rs 15, 000 Crores D) Rs 28, 000 Crores
 
Answer & Explanation Answer: B) Rs 19,000 Crores

Explanation:

In 2019, the Budgetary allocation to the Pradhan Mantri Gram Sadak Yojana was Rs 19,000 Crores.

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Q:

In order to make an electromagnet you need a

A) Dry cell batteries B) Thin coated copper wire
C) Iron nail D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

To create a simple electromagnet, you'll need a source of electricity, a conductor, and metal. Wrap insulated copper wire tightly around an iron screw or nail before connecting the wire to a battery, and watch as your new electromagnet picks up small metal objects.

 

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