Assertion: In a food chain, members of next (higher) trophic levels are fewer in numbers

Reason: number of organisms at any trophic level depends upon the availability   of organisms which serve as food at the lower level.

The factor which expresses in homozygous and heterozygous states are:

_____________ and ____________ are the parts of a flower that contain germ cells.

Some waste products are listed below:

• Grass Cutting
• Polythene Bag
• Plastic Toys
• Used Tea Bags
• Old Clothes
• Paper Straw

Which group of waste materials can be classified as non-biodegradable?

Choose the correct statement that describes arteries:

Parenchyma cells are:

Choose the event that does not take place during photosynthesis?

In Rhizopus tubular thread like structures bearing sporangia at their tips are called:

If a round, green seeded pea plant (RRyy) is crossed with wrinkled, yellow seeded pea plant (rrYY), the seeds produced in F1 generation are:

Assertion: Iron is essential for secretion of thyroxin

Reason: Insufficient iron might lead to a condition where oxygen transportation gets affected.

In the case of renal failure or uremia, which of the following is employed?

Which of the following statements is true?

Assertion: Smooth muscle fibres do not appear to be striated.

Reason: There is a regular alternate arrangement of thick and thin filaments in smooth muscle fibre.

Which of the following organisms is unable to tolerate mixing of deoxygenated and oxygenated blood?

The growth of pollen tubes towards ovules is known as:

The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was:

When a rubber balloon held between the hands is pressed, its shape changes. This happens because:

A converging lens is used to produce an image of an object on a screen,object on a screen. What change is needed for the image to be formed nearer to the lens?

Which of the following statements is correct?

A convex lens A of focal length 20cm and a concave lens B of focal length 5cm are kept in contact. If a parallel beam of light falling on the combination meets at distance …..in cm

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in figure. In the field an electron and a proton move as shown. The electron and the proton experience.

The potential difference across the 3Ω resistor is:

In your laboratory you trace the path of light rays through a glass slab for different values of angle of incidence (∠i) and in each case measure the values of the corresponding angle of refraction (∠r) and angle of emergence (∠e). On the basis of your observations your correct conclusion is:

Which of the following can sometimes be 'zero' for a moving body?

(i)Average velocity
(ii)Distance travelled
(iii)Average speed
(iv) Displacement

An electrical appliance has a resistance of 25Ω. When this electrical appliance is connected to a 230V supply line, the current passing through it will be:

A constant current flow in a horizontal wire in the plane of the paper from east to west as shown in Figure. The direction of magnetic field at a point will be North to South:

A truck carries sand. Due to a hole in the base of the truck, a significant amount of sand falls continuously. For the same condition of working of the engine, the speed of the truck should:

A student has obtained an image of a well-illuminated distant object on a screen to determine the focal length, F1 of the given spherical mirror. The teacher then gave him another mirror of focal length, F2 and asked him to obtain a focussed image of the same object on the same screen. The student found that in order to focus the same object using the second mirror, he has to move the mirror away from the screen. From this observation it may be concluded that both the spherical mirrors given to the student were (select the correct option)

In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a 12V battery will be:

An electric fuse works on the

Many salts absorb water from the atmosphere. This property is called

Artificial flavour for orange is obtained from

Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z ?

Which of the following are not ionic compounds?

(i) KCl (ii) HCl
(iii) CCl₄ (iv) NaCl

A molecule of ammonia (NH₃) has

Which one of the following metals do not react with cold as well as hot water?

Which of the following phenomena occur, when a small amount of acid is added to water ?

(i) Ionisation
(ii) Neutralisation
(iii) Dilution
(iv) Salt formation

Which of the following are chemical changes?

(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood

Which of the following metals liberate hydrogen with 5% HNO₃?

(i) Cu
(ii) Zn
(iii) Mn
(iv) Mg

Which among the following is not a base?

The heteroatoms present in

CH₃—CH₂—O—CH₂—CH₂Cl are
(i) oxygen (ii) carbon (iii) hydrogen (iv) chlorine

Which of the following conditions will increase the rate of evaporation?

An electrolytic cell consists of:

(i) positively charged cathode
(ii) negatively charged anode
(iii) positively charged anode
(iv) negatively charged cathode

In extraction of copper, the flux used is

Which of the following does not belong to the same homologous series?

If 'blue' is called 'green', 'green' is called 'white', 'white' is called 'red', 'red' is called 'black',

then what is the colour of sky?

Which two months in a year have the same calendar?

Study the following information carefully to answer the question.

1. 'A $ B' means 'A is the mother of B'.
2. 'A # B’ means 'A is the father of B'.
3. 'A @ B' means 'A is the husband of B'.
4. 'A % B' means 'A is the daughter of B'.

If F@D%K#H, then how is F related to H?

Choose the alternative which closely resembles the water-image of the given combination.

If 1st October is Sunday, then 15 November will be

In the following question, determine the number that replaces the question mark.

Rajan is the brother of Sachin and Manik is the father of Rajan. Jagat is the brother of Priya and Priya is the daughter of Sachin. Who is the uncle of Jagat?

Directions: This question is based on the following statements:

Asha and Charu are good in mathematics and yoga. Deepa and Asha are good in yoga and social studies. Charu and Beena are good in general knowledge and mathematics. Deepa, Beena and Ela are good in social studies and general knowledge. Ela and Deepa are good in a social studies and art.

Who is good in social studies, mathematics and yoga?

In a chess tournament each of the seven players will play every other player exactly once. How many matches will be played during the tournament?

Directions:

Read the following information carefully & answer the question. Among  A, B, C, D and E. E is taller than D but not as fat as D. C is taller than A but shorter than B. A is fatter  than D but not as fat as B. E is thinner than C who is thinner than D. E is shorter than A. who is the thinnest person?

In a group of cows and hens, the numbers of legs are 14 more than twice the number of heads. How many cows are in the group?

1.12.91 is the first Sunday. Which is the fourth Tuesday of December 91?

In the following question, one number is wrong in the series. Find out the number. 385, 462, 572, 396, 427, 671, 264

CLOCK : TIME :: THERMOMETER : ?

In a certain code language tap is written as szo then in the same code language freeze is written as