| What happens when ethanol is heated at 443 K |
| Why is glacial acetic acid called so |
| What happens when a small piece of sodium is dropped |
| Differentiate between saturated and unsaturated carbon compounds |
| How are structure (i) and structure (ii) given below related to one another |
| Draw the structure of the following compounds |
| Why is the separation of the right side and the left side of the heart useful |
| Name the salt formed when sulphuric acid |
| Write one difference between biodegradable and non-biodegradable |
| For the current carrying solenoid as shown, draw magnetic field lines |
| How does an electric fuse prevent the electric circuit |
| How is the type of current used in household supply different |
| Why is an alternating current (A.C.) considered to be advantageous |
| What is double circulation |
| List the role of each of the following in our digestive system |
| How does Paramecium obtain its food |
| Dry HCl gas does not change the colour of dry blue litmus paper |
| Suggest a safe procedure of diluting a strong concentrated acid |
| What is observed when silver chloride is exposed to sunlight |
| While electrolysing water before passing the current some drops of an acid |
| Use of several pesticides which results in excessive accumulation |
| Identify the defect of vision shown |
| Two green plants are kept separately in oxygen free containers |
| Write one specific function each of the following organs in relation |
| Where are auxins synthesized in a plant |
| Name the part of brain which is responsible for the following actions |
| An alpha particle enters a uniform magnetic field as shown |
| The resistance of a resistor is reduced to half of its initial value |
| The correct pattern of magnetic field lines of the field |
| Two LED bulbs of 12W and 6W are connected in series |
| The number of chromosomes in parents and offsprings |
| In plants the role of cytokinin is |
| A cross between pea plant with white flowers (vv) |
| Opening and closing of stomata is due to |
| Observe the following diagram and identify the process |
| The electron dot structure of chlorine molecule is |
| The name of the salt used to remove permanent hardness of water is |
| Sodium hydroxide is termed an alkali while Ferric hydroxide |
| Acid present in tomato is |
| A metal ribbon X burns in oxygen with a dazzling |
| When aqueous solutions of potassium iodide and lead nitrate |
| When Sodium bicarbonate reacts with dilute hydrochloric acid |
| Name the type of mirror which facilitates |
| Is the type of lens used converging or diverging |
| How do metal carbonates and metal hydrogen carbonates react with acids |
| The aims of watershed management |
| What will happen if the deer are missing in the following food chain |
| The natural ecosystems are |
| Seeds are called products of sexual reproduction because they |
| The stamen contains |