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Q:

Which of the following processes is used to remove reducible oxides from the metal?

A) liquation B) cupellation
C) poling D) electro refining
 
Answer & Explanation Answer: C) poling

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Q:

Gold and silver are extracted from their respective ores by _______

A) Smelting B) Roasting
C) Leaching D) Hydro metallurgy
 
Answer & Explanation Answer: D) Hydro metallurgy

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Q:

The bleeding of a wound is stopped by the application of ferric chloride because_____

A) Ferric chloride seals the blood vessels B) Blood starts flowing in the opposite direction
C) Blood reacts and a solid is formed which seals the blood vessels D) Blood is coagulated and the blood vessels are sealed
 
Answer & Explanation Answer: D) Blood is coagulated and the blood vessels are sealed

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Q:

The electrochemical cell stops working after some time because ________

A) Electrode potential of both the electrodes becomes zero B) One of electrodes completely vanishes
C) Electrode potential of both electrodes equalizes D) The reaction reverses its direction
 
Answer & Explanation Answer: C) Electrode potential of both electrodes equalizes

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Q:

The hard Shell of an egg was dissolved in HCL. The egg was then placed in a concentration solution of NaCl. What will happens ______

A) The egg will shrink B) The egg will swell
C) The egg will become harder D) There will be hardly any visible change
 
Answer & Explanation Answer: A) The egg will shrink

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Q:

Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________

A) Moseley's work on X-ray spectra B) Bragg's work on X-ray diffraction
C) Mulliken's oil drop experiment D) Discovery of X-ray by Roentgen
 
Answer & Explanation Answer: A) Moseley's work on X-ray spectra

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Q:

"If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C, then A and C are in equilibrium with each other". This is a statement of 

A) Cyclic rute B) Zeroth law of thermodynamics
C) First law of thermodynamics D) Second law of thermodynamics
 
Answer & Explanation Answer: B) Zeroth law of thermodynamics

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Q:

TEL minimise the knocking effect when mixed with petrol, it acts as_______

A) Positive catalyst B) Negative catalyst
C) Auto catalyst D) Induced catalyst
 
Answer & Explanation Answer: B) Negative catalyst

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