Question # 1

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

In a chemical reaction, the substance that combine are called.

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Reactant

Products

Mass

Material

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

The formula which represents the actual number of atoms in one molecule of organic compound is called.

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Molecular formula

Structural formula

Condensed formula

Dot and cross formula

At dynamic equilibrium state:

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Rate of forward reaction≠ Rate of reverse reaction

Rate of forward reaction > Rate of reverse reaction

Rate of forward reaction = Rate of reverse reaction

Rate of forward reaction < rate of reverse reaction

The reduction of alkyl halides takes place in the presence of

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

A strange bitter smell noticed near photo copier machine is of.

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H₂S

SO₂

O₂

O₃

If an organic compound has 4 carbon atoms, all singly bonded, it will have the following characteristics except one.

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It will be saturated hydrocarbon

It will hav 8 hydrogen atoms

Its name will be n-butane.

It will be least reactive.

Dehydration of alcohols can be carried out with.

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NaOH

KOH

H₂SO₄

HCl

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

Which hepatitis is caused by contaminated water?

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Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis D

Gelatin protein is found in.

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Blood

Skin

Heart

Bones

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

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10th Class Chemistry English Medium KPK Boards Online Mcqs MCQs With Answers

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