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Q:

In exo-biology we study about ________

A) External structure of living beings B) Life present on the earth
C) Life present in the other layer of earth atmosphere D) Life found in space and on other satellite
 
Answer & Explanation Answer: D) Life found in space and on other satellite

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Filed Under: Biology

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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Filed Under: Chemistry

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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Filed Under: Chemistry

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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Filed Under: Chemistry

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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Filed Under: Chemistry

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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Filed Under: Chemistry

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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Filed Under: Chemistry

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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Filed Under: Chemistry