(C) $A. 4H_3PO_3 \xrightarrow{\Delta} 3H_3PO_4 + PH_{3(g)}$ (Gas $PH_3$ is evolved).$B. 2PbO_2(s) \xrightarrow{\Delta} 2PbO(s) + O_{2(g)}$ (Gas $O_2$

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(C) $A. 4H_3PO_3 \xrightarrow{\Delta} 3H_3PO_4 + PH_{3(g)}$ (Gas $PH_3$ is evolved).$B. 2PbO_2(s) \xrightarrow{\Delta} 2PbO(s) + O_{2(g)}$ (Gas $O_2$ is evolved).$C. BaS(s) + ZnSO_4(aq.) \to ZnS(s) + BaSO_4(s)$ (No gas is evolved; both products are solids).$D. S + 2H_2SO_4(conc.) \to 3SO_{2(g)} + 2H_2O(\ell)$ (Gas $SO_2$ is evolved).Therefore,the correct option is $C$.

Class 11 Chemistry Some Basic Concepts of Chemistry Mix Examples of Some Basic Concept of Chemistry

Difficult

In which of the following reactions is no gas evolved on the product side? (Temperature is maintained below the boiling point of liquids formed)

A
$H_3PO_3 \xrightarrow{\Delta }$
B
$PbO_{2(s)} \xrightarrow{\Delta }$
C
$BaS_{(s)} + ZnSO_4(aq.) \to $
D
$S + \text{conc. } H_2SO_4 \to $

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Some Basic Concepts of Chemistry

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Mix Examples of Some Basic Concept of Chemistry

Hydrochloric acid solutions $A$ and $B$ have concentrations of $0.5 \ N$ and $0.1 \ N$ respectively. The volumes of solutions $A$ and $B$ required to make $2 \ L$ of $0.2 \ N$ $HCl$ are:

Medium

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Match the scientist's name in List-$A$ with their statement in List-$B$.

List-$A$ List-$B$

$(1)$ Roald Hoffmann $(A)$ The proportion of the mass of elements in any compound is fixed.

$(2)$ Lavoisier $(B)$ The smallest indivisible particle of matter is the atom.

$(3)$ Joseph Proust $(C)$ Chemistry is not the science of $100$ elements.

$(4)$ Dalton $(D)$ Matter can neither be created nor destroyed.

Easy

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When metallic copper comes in contact with moisture,a green powdery/pasty coating can be seen over it. This is chemically known as

Easy

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The more commonly used baking powder contains about $30\%$ $NaHCO_3$,$20\%$ $NaAl(SO_4)_2$,$10\%$ $Ca(H_2PO_4)_2$ and $40\%$ starch. Which of the following statements is/are correct?

Difficult

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$K_2CS_3$ can be called potassium:

Easy

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List-$A$	List-$B$
$(1)$ Roald Hoffmann	$(A)$ The proportion of the mass of elements in any compound is fixed.
$(2)$ Lavoisier	$(B)$ The smallest indivisible particle of matter is the atom.
$(3)$ Joseph Proust	$(C)$ Chemistry is not the science of $100$ elements.
$(4)$ Dalton	$(D)$ Matter can neither be created nor destroyed.

In which of the following reactions is no gas evolved on the product side? (Temperature is maintained below the boiling point of liquids formed)

Similar Questions

Hydrochloric acid solutions $A$ and $B$ have concentrations of $0.5 \ N$ and $0.1 \ N$ respectively. The volumes of solutions $A$ and $B$ required to make $2 \ L$ of $0.2 \ N$ $HCl$ are:

When metallic copper comes in contact with moisture,a green powdery/pasty coating can be seen over it. This is chemically known as

The more commonly used baking powder contains about $30\%$ $NaHCO_3$,$20\%$ $NaAl(SO_4)_2$,$10\%$ $Ca(H_2PO_4)_2$ and $40\%$ starch. Which of the following statements is/are correct?

$K_2CS_3$ can be called potassium:

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