Q. Why it is advised to take iodised salt?

Q. In the given diagram/figure label and give the properties of them

Q. What is 'Autotrophic nutrition?' Give one example:

Q. What are the component of the transport system in human beings? What are the functions of these components?

Q. Why do we apply paints on iron goods?

Q. Sodium [Na] and Sulphur [S] both are present in third period of modern periodic table. Which is more metallic and why?

Q. On what factors does the resistance of a conductor depends?

Q. When does an electric short-circuit occur?

Q. With the help of a labelled diagram prove by an experiment that both oxygen/air and water are necessary for rusting of iron.

Q. Why does rising Sun appears red in colour?

Q. With the help of labelled circuit diagram derive a formula to find combined resistance (R) when two or more resistance $(R_1,R_2,R_3.....)$ are connected in parallel taking symbols potential difference $\left(V\right)$ and current $\left(I\right)$.

Q. Which mirror is shown in the figure? Where is object placed with respect to the mirror? Write one characteristic of the image formed.

Q. In the given diagram which defect of the human eye is being corrected using a concave lens?

Q. Name and define unit for electric current.

Q. Name the structure shown in the figure. Also label $1$ and $2$

Q. Name the law shown in the figure. Label $1$ and $2$ according to this law.

Q. (i) Write molecular formula of Propane.
(ii) Write IUPAC name of
$H-\underset{H}{\underset{|}{\stackrel{H}{\stackrel{|}{C}}}}-\underset{H}{\underset{|}{\stackrel{H}{\stackrel{|}{C}}}}-Br$

Q. What are the different methods of contraception?

Q. Name the device shown in the given diagram. What is being prepared in it?

Q. Write two uses of Washing Soda.

Q. In the diagram what is the sex of
(A) and (B)

Q. Write two uses of spherical mirrors.

Q. Write Newland's Law of 'Octaves' for classification of elements.

Q. Label

1

and

2

in the figure.

Q. Write chemical equation for the reaction taking place in the flask. Write name and one property of the gas evolved.

Q. Write three characteristic of a good fuel.

Q. With the help of a labelled diagram explain human male reproductive system/organs.

Q. (a) Draw electron dot structure of Sodium (Na), Oxygen (O) and Magnesium (Mg).
(b) Why do ionic compounds have high melting points?

Q.