Que: Focal length of plane mirror is

1. At infinity
2. Zero
3. Negative
4. None of these

Que: The blood leaving the tissues becomes richer in

1. carbon dioxide
2. water
3. hemoglobin
4. oxygen

Que: Image formed by a plane mirror is

1. Real and erect
2. Real and inverted
3. Virtual and erect
4. Virtual and inverted

Que: In human beings, the fertilization occurs in the

1. uterus
2. ovaries
3. fallopian tubes
4. vagina

Que: In which mode of nutrition an organism derives its food from the body of another living organism without killing it?

1. Saprotrophic nutrition
2. Parasitic nutrition
3. Holozoic nutrition
4. Autotrophic nutrition

Que: Name the pores in a leaf through which respiratory exchange of gases takes place

1. Lenticels
2. Vacuoles
3. Xylem
4. Stomata

Que: Which of the given statements is not a physical change?

1. Boiling of water to give water vapour
2. Melting of ice to give water
3. Dissolution of salt in water
4. Combustion of Liquefied Petroleum Gas (LPG)

Que: An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

1. Baking powder
2. Lime
3. Ammonium hydroxide solution
4. Hydrochloric acid

Que: The internal (cellular) energy reserve in autotrophs is

1. glycogen
2. protein
3. starch
4. fatty acid

Que: Light from the Sun falling on a convex lens will converge at a point called

1. centre of curvature
2. focus
3. radius of curvature
4. optical centre

Que: Assertion: Ammonium hydroxide is Weak Base

      Reason: Phenolphthalein becomes pink in NH₂OH

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Que: The component of blood which makes chemicals known as antibodies is :

1. platelets
2. white blood cells
3. red blood cells
4. plasma

Que: The embryo in humans gets nutrition from the mother’s blood with the help of a special tissue called

1. Placenta
2. Villi
3. Uterus
4. Womb

Que: Which of the following method of contraception protects from acquiring sexually trans¬mitted diseases?

1. Surgery
2. Condoms
3. Copper-T
4. Oral-pills

Que: Which of the following are energy foods?

1. Carbohydrates and fats
2. Proteins and mineral salts
3. Vitamins and minerals
4. Water and roughage

Que: Asexual reproduction is:

1. A fusion of specialized cells
2. A method by which all types of organisms reproduce
3. A method producing genetically identical offspring
4. A method in which more than one parent are involved

Que: The green colour of plants is due to the presence of

1. chlorophyll
2. carotene
3. xanthophyll
4. starch

Que: Copper objects lose their shine and form a green coating of

1. Copper oxide
2. Copper hydroxide and Copper oxide
3. Basic Copper carbonate
4. Copper carbonate

Que: An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following

1. Mg
2. Na
3. P
4. Ca

Que: In parallel combination, the total resistance

1. decreases
2. increases
3. may decrease or increase according to the situation
4. no particular observation

Que: One of the following is not a constituent of blood. This one is

1. red blood cells
2. white blood cells
3. sieve plates
4. platelets

Que: The movement of food in phloem is called:

1. transpiration
2. translocation
3. respiration
4. evaporation

Que: Which plant tissue transports water and minerals from the roots to the leaf?

1. Xylem
2. Phloem
3. Parenchyma
4. Collenchyma

Que: The period of pregnancy is called

1. gestation period
2.  incubation period
3. ovulation
4. menstruation period

Que: The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in

1. cytoplasm
2. mitochondria
3. chloroplast
4. nucleus

Que: Rahul put his timepiece on the table in such a way that at 6 P.M. hour hand points to North. In which direction the minute hand will point at 9.15 P.M. ?

1. South-East

2. South

3. North

4. West

Que: Glycolysis process occurs in which part of the cell?

1. cytoplasm
2. Nucleus
3. mitochondria
4. chloroplast

Que: Which of the following is an endothermic process?

1. Dilution of sulphuric acid
2. Sublimation of dry ice
3. Condensation of water vapours
4. Respiration in human beings

Que: The period during adolescence when the reproductive tissues begin to mature is called

1. ovulation
2. puberty
3. ovulation
4. propagation

Que: The process of release of eggs from the ovary is called

1. menstruation
2. reproduction
3. insemination
4. ovulation

Que: Lipase acts on

1. amino acids
2. fats
3. carbohydrates
4. all of these

Que: The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called

1. Roasting
2. Reduction
3. Calcination
4. Smelting

Que: Under which of the following conditions can a concave mirror form an image larger than the actual object?

1. When the object is kept at a distance equal to its radius of curvature
2. When object is kept at a distance less than its focal length
3. When object is placed between the focus and centre of curvature
4. When object is kept at a distance greater than its radius of curvature

Que: The space around a charge in which its effect can be felt is called its

1. potential
2. field
3. field intensity
4. potential difference

Que: A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

1. -30 cm
2. -20 cm
3. -40cm
4. -60 cm

Que: Which of the following is the correct path taken by urine in our body?

1. Kidney → Ureter → Urethra → Bladder
2. Kidney → Bladder → Urethra → Ureter
3. Kidney → Ureter → Bladder → Urethra
4. Bladder → Kidney → Ureter → Urethra

Que: The force acting on a unit positive test charge at a point inside an electric field is called

1. potential
2. field
3. field intensity
4. potential difference

Que: A concave mirror gives real, inverted and same size images if the object is placed

1. At F
2. At infinity
3. At C
4. Beyond C

Que: In human males, the testes lie in the scrotum, because it helps in the

1. process of mating
2. formation of sperms
3. easy transfer of gametes
4. secretion of estrogen

Que: The site of photosynthesis in the cells of a leaf is

1. chloroplast
2. mitochondria
3. cytoplasm
4. protoplasm

Que: In a certain code ‘GIVE’ is writ­ten as ’51@©’ and ‘FAIL’ is writ­ten as ‘%219’. How is LEAF writ-ten in  that code ?

1. 5©2%

2. 9©2%

3. 9@2%

4. 9©1%

Que: Which of the following statements is correct about an aqueous solution of an acid and of a base?

(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(iii) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base

1. (i) and (iii)
2. (ii) and (iii)
3. (i) and (iv)
4. (ii) and (iv)

Que: The cells in our blood which destroy disease-causing germs, are

1. platelets
2. skin cells
3. RBCs
4. WBCs

Que: What are the products obtained by anaerobic respiration in plants?

1. Lactic acid + Energy
2. Carbon dioxide + Water + Energy
3. Ethanol + Carbon dioxide + Energy
4. Pyruvate

Que: Electrolysis of water is a decomposition reaction. The mole ratio of oxygen and hydrogen gases liberated during electrolysis of water is:

1. 1: 1
2. 2: 1
3. 4: 1
4. 1: 2

Que: In a state-level dance competition, a total of 75 people took part. Stuti’s position was 13th from the top, and Barkha stood 25th from the bottom. A total of how many participants stood between Stuti and Barkha?

1. 42

2. 30

3. 45

4. 37

Que: Q 9 K # P @ 3 E N S A C * G © U l M 7 F I V % 4 Z 8 Y Which of the following is the sixth to the left of the fifth to the left of V ?

1. A

2. N

3. S

4. None of these

Que: Which of the given shapes would complete the sequence?

1. D

2. B

3. C

4. A

Que: The correct sequence of anaerobic reactions in yeast is

Que: One of the following does not have a nucleus. It would be:

1. red blood cell
2. white blood cell
3. guard cell
4. epidermal cell

Que: Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?

1. Ethanol + Carbon dioxide + Energy
2. Lactic acid + Energy
3. Carbon dioxide + Water + Energy
4. Pyruvate

Que: The mode of nutrition found in fungi is:

1. Parasitic nutrition
2. Holozoic nutrition
3. Autotrophic nutrition
4. Saprotrophic nutrition

Que: What is the oxidation number of chlorine in HClO₄?

1. +3
2. +5
3. +7
4. +8

Que: The blood vessel which carries oxygenated blood from the lungs to the heart is

1. main artery
2. pulmonary artery
3. main vein
4. pulmonary vein

Que: Direction of flow of conventional current is taken from

1. negative to positive
2. positive to negative
3. any of the above two
4. none of the above two