DMRC Model Paper

                    DMRC Model paper/Sample paper                                      
 
                      Paper-1 (objective type) 120 questions

Section-1
Physics, chemistry, maths (75 questions)                 
Section-2
General Aptitude, general awareness, logical ability and general English (45 questions)                          

Section-I (Physics, chemistry, mathematics)

1) Which of the following is NOT a laboratory safety rule?

a) You should never mix acids with bases

b) You should tie back your long hair

c) You should never add water to acid

d) All of the above are valid safety rules

2) What piece of laboratory equipment is best-suited for accurately measuring the volume of

a liquid?

a) graduated cylinder

b) beaker

c) Erlenmeyer flask

d) more than one of the above

3) Which piece of laboratory equipment can be used to store chemicals for long periods of

time?

a) buret

b) evaporating dish

c) beaker

d) more than one of the above

4) The independent variable in an experiment is:

a) The variable you hope to observe in an experiment.

b) The variable you change in an experiment.

c) The variable that isn’t changed in an experiment.

d) none of these is correct

5) “Qualitative results” refer to:

a) Results that can be observed during an experiment.

b) Results that are difficult to observe during an experiment.

c) Results that require numerical data.

d) none of these is correct.

6) When drawing a graph that measures family average income over a period of 50 years,

the independent variable is:

a) Income

b) Average

c) Years

d) It is impossible to say

7) Accuracy is defined as:

a) A measure of how often an experimental value can be repeated.

b) The closeness of a measured value to the real value.

c) The number of significant figures used in a measurement.

d) None of these

8) How many significant figures are present in the number 10,450?

a) three

b) four

c) five

d) none of these

9) What is the appropriate SI unit for distance?

a) centimeters

b) inches

c) meters

d) kilometers

10) How many decimeters are there in 15 centimeters?

a) 150 dm

b) 1.5 dm

c) 0.15 dm

d) none of these

11) How many kilograms are there in 4.21 pounds? There are 2.2 pounds in 1 kilogram.

a) 9.26 kg

b) 1.91 kg

c) 0.523 kg

d) none of these

12) A homogenous material is defined as being:

a) An element

b) Any material with uniform composition

c) Synonymous with “solution”

d) More than one of these

13) An example of a chemical property is:

a) density

b) mass

c) acidity

d) solubility

14) “Exothermic” processes:

a) Absorb energy

b) Give off energy

c) Have no energy change

d) It is impossible to predict the energy change of an exothermic process.

15) Intrinsic properties are properties that:

a) Don’t depend on the amount of material present.

b) Depend on the amount of material present.

c) Cannot be measured without performing a chemical reaction.

d) None of the above is correct.

16) What is the density of an object with a volume of 15 mL and a mass of 42 grams?

a) 0.352 g/mL

b) 2.80 g/mL

c) 630 g/mL

d) None of the above is correct.

17) Which of the following is not one of Dalton’s laws?

a) Atoms are indestructible.

b) Atoms of the same element have isotopes with different masses.

c) Atoms of different elements have different chemical and physical properties.

            d) All of these are examples of Dalton’s laws

18) The “plum pudding” model of the atom was devised by:

a) Dalton

b) Democritus

c) Rutherford

d) none of the above answers is correct

19) Bohr’s model of the atom was able to accurately explain:

a) Why spectral lines appear when atoms are heated.

b) The energies of the spectral lines for each element.

c) Why electrons travel in circular orbits around the nucleus.

d) none of the above answers is correct.

20) What subatomic particle has a mass of one atomic mass unit?

a) proton

b) neutron

c) electron

d) more than one of the above

21) How many electrons does iron have?

a) 26

b) 30

c) 56

d) It depends on the isotope of iron

22) True or false: All isotopes are radioactive.

a) True

b) False

23) Mass spectrometers separate isotopes of different elements based on their:

a) mass

b) electric charge

c) mass divided by electric charge

d) none of these

24) What percent of atoms of magnesium have a mass of exactly 24 amu?

a) 100%

b) 70%

c) 30%

d) 0%

25) The colors of light given off when a sample is heated corresponds to:

a) The energy difference between the ground state and excited state of an element.

b) The amount of energy added to the sample.

c) The heat of the element.

d) None of the above

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