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Q:

Beryl is an ore/mineral of

A) Nickel B) Beryllium
C) Lead D) Tin
 
Answer & Explanation Answer: B) Beryllium

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Q:

Atomic number of which of the following elements is greater than that of Phosphorus?

A) Aluminium B) Silicon
C) Chlorine D) Magnesium
 
Answer & Explanation Answer: C) Chlorine

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Q:

Which of the following elements has the lowest melting point?

A) Iron B) Nitrogen
C) Iodine D) Lead
 
Answer & Explanation Answer: B) Nitrogen

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Q:

Which of the following is a mixture?

A) Water B) Air
C) Carbon dioxide D) Oxygen
 
Answer & Explanation Answer: B) Air

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Q:

Which of the following statement(s) is/are INCORRECT regarding Phosphorus?

A) Phosphorus reacts vigorously with water B) It is a non-metal
C) It catches fire on reacting with air D) It is found in group 15 of the modern periodic table
 
Answer & Explanation Answer: A) Phosphorus reacts vigorously with water

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Q:

Dried fruit like raisins when soaked in water, bulge and get filled with water. What is the scientific reason that explains this daily life event?

 

A) Osmosis B) Active Transport
C) Diffusion D) Passive Transport
 
Answer & Explanation Answer: A) Osmosis

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Q:

The pH of a solutiion is 3. When its pH changes to 6, then H+ ion concentration

A) increases 2 times B) increases 3 times
C) decreases 1000 times D) decreases 100 times
 
Answer & Explanation Answer: C) decreases 1000 times

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Q:

___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

A) Methane B) Greenhouse
C) Carbon dioxide D) Ozone
 
Answer & Explanation Answer: B) Greenhouse

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