Chemistry Questions

Q:

Radioactive decay is likely to occur when

A) an atom has too many neutrons or protons B) protons break into neutrons and electrons
C) an atom has too many electrons D) atoms collide with one another
 
Answer & Explanation Answer: A) an atom has too many neutrons or protons

Explanation:

Radioactive decay is likely to occur when the nuclei of an atom doesn't have enough binding energy to hold the nucleus together due to excess of rotons or nutrons in it.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , GATE
Job Role: Analyst , Bank Clerk , Bank PO

2 3334
Q:

Is deposition endothermic or exothermic?

A) Endothermic B) Exothermic
C) Both A & B D) Can't be determined
 
Answer & Explanation Answer: B) Exothermic

Explanation:

In thermodynamics, deposition is a phase transition in which gases are directly transformed to solids without converting to liquids first.

 

For example, watervapour is directly changed to ice without first becoming to liquid water. In this process, heat is released making the process exothermic process.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

1 3329
Q:

Which one is not the isotopes of hydrogen

A) Protium B) Deuter
C) Tritium D) All
 
Answer & Explanation Answer: C) Tritium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 3323
Q:

Energy transfer by convection is primarily restricted to

A) fluids B) solids
C) liquids D) gases
 
Answer & Explanation Answer: A) fluids

Explanation:

Convection is the mode of heat transfer which involves bulk motion of a fluid to transfer heat. Energy transfer by convection is primarily restricted to fluids. Fluids can be both liquids and gases.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

2 3319
Q:

Which among the following minerals is also known as Horn Silver?

A) Silver Chroride B) Zinc Phosphate
C) Silver Iodide D) Silver Sulphide
 
Answer & Explanation Answer: A) Silver Chroride

Explanation:

Silver chloride is a chemical compound with the chemical formula AgCl is also called as Horn Silver. It is also called as cerargyrite. It is a gray, very heavy halide mineral and an ore of silver.

Which_among_the_following_minerals_is_also_known_as_Horn_Silver1560942904.jpg image

 

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

0 3305
Q:

Which of the following is a Decomposition Reaction?

A) 2HgO ----> 2Hg + O2 B) 6NaNO3 ----> 6NaNO2 + 3O2
C) ZnCO3 ----> ZnO + CO2 D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

All the given reactions are Decomposition reactions.

Decomposition reaction is a reaction in which only one reactant is splitted into two or more products.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

2 3287
Q:

Shock resisting steels should have

A) toughness B) low wear resistance
C) low tensile strength D) low hardness
 
Answer & Explanation Answer: A) toughness

Explanation:

Shock resisting steels should have toughness.

S-5 is a silico-manganese shock resisting steel that offers good ductility.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

0 3287
Q:

PAS is a drug used in the treatment of

A) Cancer B) Typhoid
C) Malaria D) Tuberculosis
 
Answer & Explanation Answer: D) Tuberculosis

Explanation:

Para-amino salicylic acid (PAS) is used in the treatment of Tuberculosis.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

4 3274