Which of the following reactions are exothermic? | Chemistry Questions & Answers

Q:

Which among the following is an example of mixture?

A) Milk	B) Gasoline
C) Liquefied petroleum gas	D) All options are correct

Answer & Explanation Answer: D) All options are correct

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Q:

What is the number of groups and periods in the modern periodic table?

A) 18, 7	B) 18, 8
C) 16, 7	D) 16, 8

Answer & Explanation Answer: A) 18, 7

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Q:

Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in

A) Conduction	B) Convection
C) Radiation	D) Both conduction and convection

Answer & Explanation Answer: B) Convection

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Q:

What is dry ice?

A) Solid Carbon dioxide	B) Solid Nitrogen dioxide
C) Solid Sulphur dioxide	D) Solid Water

Answer & Explanation Answer: A) Solid Carbon dioxide

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Q:

Which among the following metal is used for galvanization?

A) Zinc	B) Copper
C) Iron	D) Silver

Answer & Explanation Answer: A) Zinc

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Q:

Which element is generally No Radioactive?

A) Thorium	B) Polonium
C) Germanium	D) Plutonium

Answer & Explanation Answer: C) Germanium

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Q:

Hydrogenation process is associated with which of the following?

A) Rubber	B) Petroleum
C) Copper	D) Edible fats

Answer & Explanation Answer: D) Edible fats

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Q:

........... compound is used as a drying agent.

A) Calcium oxide	B) Calcium carbide
C) Gypsum	D) Calcium carbonate

A) 1	B) 2
C) 3	D) 4

Which of the following reactions are exothermic?

$1) C + O_{2} \to {CO}_{2} 2) 2 Mg + O_{2} \to 2 MgO 3) {CuSO}_{4} + 5 H_{2} O \to {CuSO}_{4} . 5 H_{2} O 4) All the above$

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Which of the following reactions are exothermic? 1) C + O2 → CO22) 2Mg + O2 → 2MgO3) CuSO4 + 5H2O → CuSO4.5H2O4) All the above

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Which of the following reactions are exothermic?

$1) C + O_{2} \to {CO}_{2} 2) 2 Mg + O_{2} \to 2 MgO 3) {CuSO}_{4} + 5 H_{2} O \to {CuSO}_{4} . 5 H_{2} O 4) All the above$