Question # 1

Third structure of protein structure refers to

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Number and sequence of amino acids

Three dimensional structure of protein

Proteins formed of more than one monomer

Bending of protein molecule

In NaCl cyrstal Na⁺ion is surrounded by how many ions of Cl^-

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4

6

8

10

Amylum is another name of

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Starch

Amylose

Amylopectin

Cellulose

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

What is the weight of 10 litres of CO₂at 27°C and 2 atm?

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89.3 g

36.1 g

125 g

127 g

Polysaccharides are

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Polyester

Polyamides

Poly ethers

Polynucleotide

Monosacharide belongs to the groups:

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fats

carbohydrates

lipids

proteins

Amino acids ionize in water to form

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Zwitterion

Internal saH

Dipolar ion

All of these

Which of the following gases diffuse quickly:

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N₂

NH₃

CO₂

Cl₂

Which of the following factors is not used to determine the quality of water

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COD

BOD

DO

Available chlorine

Covalent bonds are

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directional

Bidirectional

Multidirectional

Non directional

The percentage of nitrogen in ammonium nitrate is

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32 - 33.5%

34 - 36%

40 - 45%

None of these

Salol is prepared from

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Salicylic acid and phenol

Salicylic acid and methyl alcohol

Both

None

C₁₈and onward hydrocarbons are normally

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Gases

Liquids

Solids

Plasma

Which of the following compounds is explosive in nature?

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Phosphorus trichloride

Nitrogen trichloride

Hyponitrous acid

Nitrosyl chloride

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

The solubility product of AgCl is 2.0 x 10^-3 mol² dm^-6 , The maximum concentration of Ag ion in the solution is :

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2.0 x 10^-10 mol dm^-3

1.41 x 10^-10 mol dm^-3

1.0x 10^-10 mol dm^-3

4.0x 10^-10 mol dm^-3

The number of elements in the first, second and third period are

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2, 8, 18

8, 2, 18

2, 18, 8

2, 8, 8

The energy of the system and surrounding is conserved. This is a statement of

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Law of mass action

Law of definite proportion

Law of conservation of energy

Second law of thermodynamics

An electric current is passed through silver nitrate solution using silver electrodes.10.79 g of silver was found to be deposited on the cathode if the same amount of electricity is passed through copper sulphate solution using copper electrodes, the weight of copper deposited on the cathode is

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6.4 g

2.3 g

128.8 g

3.2 g

Atoms obey octet rule by sharing-electrons making covalent bonds according to

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Lewis and Kossal theory

Valance bond theory

VSEPR theory

Molecular orbital theory

Law of mass action states that rate of chemical reaction is directly proportional to the product of active masses of the reactants. The term active mass means

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Mass in grams converted to products

Number of moles

Number of moles per dm³of reactants

Total pressures of the reactants

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