Plants use completely different process for excretion as compared to animals. Which one of the following processes is not followed by plants for excretion?

An experiment is set up as shown. To perform the experiment, we put the top end of the tube C in mouth and 'breath in' and 'breath out' gently. ldentify in which of the boiling tube lime-water turns milky appreciably.

Observe the given flowchart and identify the blank A from the given options.

Select the option that Incorrectly matches the organ to digestive reactlon taking place in it.

The bacterial and the viral infections that may be caused due to unsafe sex respectively are

Two convex lenses P and Q have focal length 0.50 m and 0.40 m respectively. Which of the following is true about the combined power of the two lenses?

A lens has a power of + 4.0 D. It is

Which statement explains why the shoot of a plant bends when exposed to light from one side?

Mineral acids are stronger acids than carboxylic acids because

The structural formula of cyclohexane is

Shown below is a container that is used in the transportation of goods over long distances.

These containers are made of steel. Which property of steel is mainly used to make these containers?

In the given experimental set-up, if the experiment is carried out separately with each of the following solutions the cases in which the bulb will glow is

Raman wants to draw a graph to show how the resistivity (ρ) of a wire changes with the length (l) of the wire. What should his graph look like?

In case of four wires of same material, the resistance will be minimum, if the diameter and length of the wire respectively are

Which one of the following Is the correct set-up for studying the dependence of the current on the potential difference across a resistor and why?

If the resistance of wire A is four times resistance of wire B then the ratio of cross sectional areas of wires is

Graphs between electric current and potential difference across two conductors A and B are shown in the figure. Which of the following conductor has more resistance?

What sets electron into motion in an electric circuit

A man has five resistors each of 1/5\(\Omega \) What is the maximum resistance he can obtain by connecting them?

Seven identical lamps of resistance 220 \(\Omega\)each are connected to a 220 V line as shown in figure. Then reading of ammeter will be

The part of eye that determines the colour of the eye of a person is

Colour blindness is caused due to

The phenomenon of light responsible for the working of the human eye is

Convex lens forms a real, point sized image at focus, the object is placed

The mirror that always gives virtual and erect image of the object but image of smaller size than the size of the object is

Power of a lens is - 4, its focal length is

Which of the following can be called a characteristic?

With whom we associate theory of evolution

A section of DNA providing information for one protein is called

Identify the organism

Union of male and female gametes forms

Why are the testes located outside the abdominal cavity in scrotum

In which of the following plant bud in notches of leaves help in its propagation?

The female reproductive part of the flower consists of

Where does fertilisation occur in human females

Deficiency of iodine in our body causes:

Two plant hormones which regulate growth of plant are:

In multicellular organisms, control and coordination activities are performed by

Name the artificial method for the removal of liquid nitrogenous waste from body

CO₂ is transported in our body through

Covalent compounds

Which is denatured spirit?

Which of the following is used to oxidise ethanol to ethanoic acid

An alloy of Zn and Cu is dissolved in dil. HCl. Hydrogen gas is evolved. In this evolution of gas

Soda-acid fire extinguishes the fire by

An element 'X' forms a solid oxide which dissolves in water forming solution which turns blue litmus paper red, 'X' is

The composition of aqua regia is

The aqueous solution of which of the following salt will have higher OH^- ions?

Which one of the following will turn blue litmus red?

Dissolving of quick lime in water is accompanied by

A drop of colourless liquid is poured over blue litmus paper and it turns to red. The colourless liquid is

The preparation of water from hydrogen and oxygen gas is accompanied by:

 Reaction between Ammonium chloride and Barium hydroxide is

Which information is not conveyed by a balanced chemical equation?

A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

Which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in Figure?

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

A student sitting on the bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statement is correct?

Rays from Sun converge at a point 15 cm in front of a concave mirror. Where an object should be placed so that size of its image is equal to the size of the object? 

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.

Select the correct statement

An example of homologous organs is

The first member of alkyne homologous series is

Tiny pores present on the surface of the leaf are called

Electrical wires have a coating of an insulating material. The material, generally used is

Although metals form basic oxides, which of the following metals form an amphoteric oxide?

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?

An electrolytic cell consists of
(i) Positively charged cathode
(ii) Negatively charged anode
(iii) Positively charged anode
(iv) Negatively charged cathode

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

(i) Good thermal conductivity

(ii) Good electrical conductivity

(iii) Ductility

(iv) High melting point

Which of the following is not an involuntary action?

The growth of tendril in pea plants is due to

Which is the correct sequence of parts in human alimentary canal?

Ohm's law is valid only when

Materials which allow larger current to flow through them are called

Methane on combustion gives

In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved temperature?

Which of the following statement is not correct?

Which of the following is not a mineral acid?

Which among the following is /are double displacement reaction(s) ?
(i) Pb + CuCl₂ \(\rightarrow\) PbCl₂ + Cu
(ii) Na₂SO₄ + BaCl₂ \(\rightarrow\) BaSO₄ + 2NaCl
(iii) C + O₂ \(\rightarrow\) CO₂
(iv) CH₄ + 2O₂ \(\rightarrow\) CO₂ + 2H₂O

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange.  Which of the following would change the colour of this pH paper to greenish-blue?