Question # 1

How many zones through which the charge passes in a rotary kiln?

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4

3

2

5

The values of ∆H for the process l(g)+e-1--------->
I-1(g) is:

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>0

<0

0

None

All are dicarboxylic acids except

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Oxalic acid

Malonic acid

Picric acid

Tartaric acid

Which of the following salts would give the same products irrespective of whether its molten form or concentrated aqueous solution is electrolysed?

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Magnesium bromide

Magnesium sulphate

Copper sulphate

Copper chloride

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

Which one of the following statements about glucose and sucrose is incorrect:

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both are soluble in water

both are naturally occurring

both are carbohydrates

both are disacharides

Correct order of intermolecular forces

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Gas < liquid < solid

Liquid < gas < solid

Gas < liquid < solid

Gas = liquid = solid

The surface formed by the breakage of a crystal is called _____ plane

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Crystal

Unit

Cleavage

None

what is it difficult to cook food at high as compared to at sea level? Choose the correct reason.

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H-bonding in H₂O changes with height

temperature at the top of mountain is low

density of water decreases at the mountain

boiling point of water decreases at the mountain

The species which are produced by heterolytic bond breaking and can act as electron pair donor

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Free radicals

Cations

Nucleophiles

electrophile

Leachate contains:

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fatty acids

Bacteria

Heavy metals

All of these

Fatty acids are:

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Allphatic monocarboxylic acids

Dicaroxylic acids

Tricarboxylic acids

Tetracarboxylic acids

Poly carboxylic acids

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

Which of the following is not true for metalloids

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They are borderline elements that exhibit both metallic and non-metallic properties to some extent

They usually act as electron donors with non-metals and as electron acceptors with metals

Some of these elements are boron, silicon and germanium

They are good conductors of heat and electricity

What is the molarity of the solution that contains 20 grams of NaOH in 500 ml of solution [Na = 23, O = 16, H = 1]

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0.25

0.5

1

20

The total number of d-bock transition element is

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10

14

40

30

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

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

denaturing of alcohol is done by adding methanol in ethanol:

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10%

20%

30%

40%

Factors affecting denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

Which compound will not dissolve in H₂O

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C₆H₆

C₂H₅OH

CH₃CH₂CH₂OH

CH₃- OH

Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to

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