Question

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1. If a wooden, plastic and a metal ball of same size are dropped at the same time from the same height in a perfect vacuum, which one will hit the ground first?
a. Metal first, then plastic, then wood
b. Wood first, then plastic, then metal
c. They will all hit the ground at the same time
d. There is no way to tell

2. The mass of an object is measured on Earth. The mass is 5.0 kg. The object is taken to the Moon. The mass of the object is measured on the Moon. What is the mass of the object on the Moon?
a. 0 kg
b. More than 0 kg, but less than 5.0 kg
c. 5.0 kg
d. More than 5.0 kg

3. A space probe lands on a planet where the pull of gravity is less than on Earth. Compared to the space probe being on Earth:
a. both its mass and its weight will be less than on Earth
b. its mass will be less but its weight will be the same as on Earth
c. its mass will be more but its weight will be less than on Earth
d. its mass will be the same but its weight will be less than on Earth

4. Which of the following is/are the characteristic of metals?
1.They are capable of forming cations.
2.They have 4 to 8 valence electrons.
3.They are capable of forming anions easily.
4.They have one to three valence electrons
a. only 4
b. 2 and 3
c. only 3
d. 1 and 4

5. Properties of substances W, X, Y and Z are listed below:

W: A liquid metal
X: A liquid non-metal
Y: Gaseous non-metal
Z: A non-metal which conducts electricity.

W, X, Y and Z are respectively

a. Copper, phosphorus, nitrogen and carbon
b. Mercury, bromine, oxygen and graphite.
c. Iron, iodine, hydrogen and oxygen
d. Mercury, sulphur, chlorine and hydrogen

6. The balanced chemical equation for sodium kept in air for some time is
a. 2 Na + H2O ---------> 4 NaOH
b. 4Na + O2 -----------> 2NaO
c. 2 Na + H2O ----------> 2Na2O
d. 4 Na + O2 -----------> 2Na2O

7.A radioactive isotope of Thorium undergoes an alpha decay and forms a stable atom. After the emission of an alpha particle by Thorium (90 Th232), the number of neutrons in the stable atom will be:
a. 88
b. 230
c. 140
d. 228

8.Which of the following is a pair of isotopes?
a. 11 A 23 and 17 B 35
b. 11 A 23 and 11 A 24
c. 6 A 14 and 6 B 12
d. 20 A 40 and 18 B 40

9. A patient complains to the doctor of unexplained weight loss, severe thirst and frequent need of urination.
A test shows high levels of glucose in the urine. Which condition does the doctor diagnose?
a. Cardiovascular disease
b. Diabetes
c. Kidney failure
d. Obesity

10. Which of the following cell structures can be seen in root cells?
a. Plasma membrane, Mitochondria, Nucleus and Centrosomes.
b. Mitochondria, Plasma membrane, Nucleus and Chloroplasts.
c. Nucleus, Plasma membrane, Ribosomes and Chromoplasts.
d. Plasma membrane, Mitochondria, Nucleus and Ribososmes.

Answer 1

Answer:

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