3
Q:

Which of the following group is NOT Dobereiner Triads?

 

A) Li, Na, K B) N, P Au
C) Cl, Br, I D) Ca, Sr, Ba

Answer:   B) N, P Au



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Subject: Chemistry
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Q:

Vinegar and Baking Soda together produce ____________.

A) Copper B) Carbon Dioxide
C) Copper Sulphate D) Magnesium Oxide
 
Answer & Explanation Answer: B) Carbon Dioxide

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3 870
Q:

Crystallisation is an example of?

A) Physical Change B) Chemical Change
C) Chemical Reaction D) Galvanisation
 
Answer & Explanation Answer: A) Physical Change

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2 857
Q:

Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of

A) Open system B) Closed system
C) Isobaric system D) Isothermal system
 
Answer & Explanation Answer: A) Open system

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1 881
Q:

Which of the metals has the maximum thermal conductivity?

A) Iron B) Aluminium
C) Silver D) Copper
 
Answer & Explanation Answer: C) Silver

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1 1320
Q:

Which of the following gases is known as "Laughing Gas"?

A) Nitrous oxide B) Nitrogen peroxide
C) Nitrogen D) Nitric oxide
 
Answer & Explanation Answer: A) Nitrous oxide

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0 922
Q:

Which of the following is not an Igneous Rock?

A) Dolomite B) Granite
C) Basalt D) Gabbro
 
Answer & Explanation Answer: A) Dolomite

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0 864
Q:

Which of the following is used as non­ stick coating for cooking utensils?

A) Perspex B) Styrofoam
C) Polystyrene D) Teflon
 
Answer & Explanation Answer: D) Teflon

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2 1294
Q:

Atomic explosion is triggered by

A) thermo nuclear reaction B) chemical reaction
C) controlled chain reaction D) uncontrolled chain reaction
 
Answer & Explanation Answer: D) uncontrolled chain reaction

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2 861