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Created on April 01, 2022 By Preptestsonline

Chemistry MCQs Set 2

1 / 15

In solids the temperature is the measure of__________________?

Average kinetic energy of molecules

Vibrational kinetic energy

Translational kinetic energy

None of the above

2 / 15

All the transition elements show_________________?

Similar physical properties

Similar chemical properties

Both A and b

None

3 / 15

Purines and pyrimidines are_________________?

Enzymes

Nitrogenous bases

Carbohydrates

Lipids

4 / 15

Which of the following element doesnot show allotropy_________________?

Carbon

Arsenic

Nitrogen

Sulphur

5 / 15

Benzene is a good solvent for__________________?

fats

resins

iodine

all the above

6 / 15

If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________?

0?C

273.16K

?273.16 K

?273.16?C

7 / 15

When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?

phenol is unsaturated

2-bromophenol is insoluble in water

a hydroxy group makes the benzene ring more susceptible to electrophilic attack

acid-base reaction

8 / 15

---

The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent ?

alkaline aquenous iodine

aqueous bromine

Fehling solution

aqueous NaOH

9 / 15

In the van der Waals equation (P + n2a / v2) (v – nb) = nRT which of the following statement is not true ?

n2a/v correct for the intermolecular forces.

nb correct for the volume occupied by gas molecules.

at high densities the equation reduces to the ideal gas law

all of the above statements are correct.

10 / 15

Regular coiling or zigzagging of polypeptide through hydrogen bonding is its___________________?

Quantum structure

Secondary structure

Tertiary structure

Primary structure

11 / 15

Which of the following is the formula of chrome red ?

Pb3 O4

2Pb CO3 – Pb (OH)2

Pb Cr O4 – Pb (OH)2

Pb2O

12 / 15

Across short period the melting and boiling point increase upto __________________?

IIIA group

IVA group

VA group

VIA group

13 / 15

Which of the elements do not fall in stair case of the modern periodic table__________________?

Si

As

Te

None of the above

14 / 15

Which of following metals can be displaced by all other metals from its solution ?

Ag

A

Au

Cu

15 / 15

In which of the following type of reactions energy of reactant is greater than energy of product________________?

endothermic

exothermic

unpredictable

same

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