Question # 1

Consider gas is measure in bars then the units of rate of reaction is

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Mole dm-3 sec

Bars sec

Mole dm-3 sec-1

Bars sec-1

Which of the following least resemble an ideal gas?

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ammonia

helium

hydrogen

trichloromethane

Which one is more toxic?

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Fe

C

Hg

Ag

Which is the drived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

Denaturation of protein means the structure of protein is distrupted. indicate which factor does not denature protein

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heating protein

pH changes

oxidising agent

keeping pH 7.35

Chemical like Al₂(SO₄) or alum are used in purification of water druing step:

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aeration

coagulation

chlorination

treatment

Hydration of ethene is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

Which of the following is a steroid?

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vitamin A

vitamin B

vitamin C

vitamin D

Reactivity of carbonyl compounds is due to

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Electrophilic carbon

Less stearic hindrance

Unsaturation of Co

Polarity of bond

Which of the following is NOT thermoplastic

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PVC pipes

Plastic toys

Varnish

Both A and B

Which of the following statements is true about Galvanic cell

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Anode is negatively charged

Reduction occurs at anode

Cathode is positively charge

Reduction occurs at cathode

The amino acids which human body can synthesize are called ______ amino acid

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Essential

Non essential

Acidic

Basic

Cracking done at low pressure and with a catalyst is called _______ cracking

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Thermal

Catalytic

Steam

None of them

Mass spectrometer measures the

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Exact mass of an element

Average mass of an element

The number of elements present in a molecule

m/e value of a positive ion

For the representative elements from left to right across a period in the periodic table, the electron effinity of the atom generally

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Increases

Remains constant

Decreases

Not clear

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Preparation of vegetable ghee involves

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Halogenations

Hydrogenations

Hydroxylation

Dehydrogenations

Which gas is used for welding purposes

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Butane

Nitrogen

Methane

Acetylene

Which is possible in ethers?

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Reactivity high

Oxidation and reduction

Reactivity towards bases

Towards acids

In an exothermic reaction

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Enthalpy of reactants is lesser than that of products

Enthalpy of reactants is greater than that of products

Heat is transferred form surrounding into the system

Enthalpy of reactants and products same

During the manufacturing process of cement the temperature of the decomposition zone goes up to

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600°C

800°C

1000°C

1200°C

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