Reflex action

Briefly explain the following term: Reflex action

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Construct a circle of radius 4.5 cm

Use ruler and compass for this question. Construct a circle of radius 4.5 cm. Draw a chord. AB = 6 cm.

  1. Find the locus of points equidistant from A and B. Mark the point where it meets the circle as
  2. ...
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When the President can declare a National Emergency

Write any one circumstance when the President can declare a National Emergency.

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The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added

The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added.

Given: Specific heat capacity of water = 4200 J kg-1 °C-1 and Specific...

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To test a leaf for starch, the leaf is boiled in water

Complete the following paragraph by filling in the blanks (i) to (v) with appropriate words:

To test a leaf for starch, the leaf is boiled in water to (i) ____. It is then boiled in Methylated...

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The layer of the eyeball that provides nourishment to the eye

The layer of the eyeball that provides nourishment to the eye.

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The electrolysis of acidified water is an example of

The electrolysis of acidified water is an example of

  1. Reduction
  2. Oxidation
  3. Redox reaction
  4. Synthesis
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Leaf and Liver [form in which glucose is stored]

Leaf and Liver [form in which glucose is stored]

Differentiate between the following pairs on the basis of what is indicated in the brackets.

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When an ovum gets fertilized, menstrual cycle stops

When an ovum gets fertilized, menstrual cycle stops temporarily in a woman.

Give scientific reasons.

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Name the gas that is produced in - Action of dilute hydrochloric acid on sodium sulphide

Name the gas that is produced in - Action of dilute hydrochloric acid on sodium sulphide

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What are isobars
  1. What are isobars?
  2. Give one example of isobars.
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The diagram shows a circuit with the key k open

The diagram above shows a circuit with the key k open.

Calculate:

  1. the resistance of the circuit when the key k is open.
  2. the current drawn from the cell when the key k is open.
  3. the resistance of the circuit
  4. ...
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