POLYCET (2022) – 10

Most of the relationships between sets can be represented by means of diagrams which are known as
a. Pie diagrams
b. Histograms
c. Pictograms
d. Venn diagram

The set of intelligent students in class is
a. A null set
b. A singleton set
c. A finite set
d. Not a well defined collection

There are 600 students in a school. If 400 of them can speak Telugu, 300 can speak Hindi, then the number of students who can speak both Telugu and Hindi is:
a. 100
b. 200
c. 300
d. 400

The cardinal number of even prime number set is
a. 1
b. 0
c. 2
d. 3

In a group of 52 persons, 16 drink tea but not coffee, while 33 drink tea. How many persons drink coffee but not tea?
a. 17
b. 36
c. 23
d. 19

An observer 1.5 m tall is 28.5 m away from a chimney . the angle of elevation of the top of the chimney from his eyes is 450 . find the height of the chimney is
a. 30 m
b. 60 m
c. 50 m
d. 20 m

The angle formed by the line of sight with the horizontal , when the point being viewed is above the horizontal level is called
a. Vertical angle
b. Obtuse angle
c. Angle of depression
d. Angle of elelvation

From top of the tower , the angle of depression of two points at distances 4 m and 9 m from base of the tower are complementary to each other . the height of the tower is
a. 5 m
b. 9 m
c. 6 m
d. 12 m

A pole 15m long rests against a vertical wall at an angle of 300 with the ground . How much high the wall does the pole reach ?
a. 7.5 m
b. 9.2 m
c. 5.8 m
d. 8.5 m

From top of the tower , the angle of depression of two points at distances 4 m and 9 m from base of the tower are complementary to each other . the height of the tower is
a. 6 m
b. 9 m
c. 12 m
d. 5 m

In neutralization reaction ————is formed with water
a. Acid
b. Base
c. Salt
d. Ice

If a solution converts red litmus into blue colour, then its pH value is
a. 1
b. 4
c. 5
d. 10

Which one of the following types of medicines is used for treating indigestion ?
a. Antibiotic
b. Analgesic
c. Antacid
d. Antiseptic

Which of the following precipitate is formed on mixing calcium hydroxide with carbon dioxide?
a. Red precipitate of calcium carbonate
b. Blue precipitate of calcium carbonate
c. Black precipitate of calcium carbonate
d. White precipitate of calcium carbonate

Which of the following is not true about pH?
a. It indicates the concentration of H+ ions in solutions of less than 1 molar
b. At pH=0,the hydronium ion concentration in 1 molar
c. At pH=0,the hydroxyl ion concentration in 1 molar
d. All

A scale for measuring hydrogen ion concentration in a solution is called
a. Universal indicator
b. pH scale
c. Natural indicator
d. Olfactory indicator

Common salt is used in raw material for making
a. Washing soda
b. Baking soda
c. Washing soda & Baking soda
d. Slaked lime

What will happen when solution of acid mixed with solution of base in a test tube ?
a. The temperature of solution increases
b. Salt will be formed
c. Temperature of solution remains constant
d. The temperature of solution increases & Salt will be formed

What gas is produced when magnesium is made to react with hydrochloric acid ?
a. Hydrogen
b. Oxygen
c. Carbon dioxide
d. No gas is produced

Bases which are soluble in water are called
a. Acidic
b. Basic
c. Alkali
d. Neutral

Carbon dioxide is usually transported in the blood as
a. Carbonate
b. Bicarbonate
c. Haemocarbonate
d. All the above

Lenticels are the respiratory organs exist in this part of plant
a. Young part
b. Soft part
c. Woody part
d. None of this

What will happen to plants if rate of respiration is more than rate of photosynthesis
a. Live long but can’t store carbohydrates
b. Die
c. Plant grows rapidly
d. Growth reduces & die due to hunger

The animal performing cutaneous respiration is
a. Fish
b. Human
c. Cat
d. Lion

Which of the following is correct
i. The diaphragm contracts-volume of chest cavity increased
ii. The diaphragm contracts-volume of the chest cavity decreased
iii. The diaphragm expands-volume of chest cavity increased
iv. The diaphragm expands-volume of chest cavity decreased
a. i & iv
b. i & ii
c. ii & iii
d. iv only

Several intermediate products are formed in
a. Combustion
b. Combustion & Respiration
c. Respiration
d. Heating charcoal powder

Exhaled air contains more
a. CO2
b. H2O
c. N2
d. CO2, H2O

These organisms obtain oxygen and expel carbon dioxide directly from the process of the body by the process of diffusion
a. Amoeba
b. Hydra
c. Planarians
d. All the above

What will happen when pressure is exerted on lungs
a. Inspiration
b. Expiration
c. Chest cavity increases
d. Chest cavity decreases

Who wrote that “respiration is a combustion, very slow indeed and oxygen not only combines with carbon but also with hydrogen”
a. Lavoisier
b. Priestley
c. Engleman
d. Ingenhousz