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Complete the following chemical reaction:
\[\ce{CuSO4 (aq) + Pb (s) -> \underline{}\underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the chemical reaction type.
Concept: undefined >> undefined
Tara, after completing her exams, went to her grandmother's house along with her younger brother Rahul. One day, Rahul came home after playing and switched on the fan and air conditioner. At the same time, his grandmother was preparing a milkshake for him using a mixer. Suddenly, they heard a big sound and the electricity of the house got shut down. Tara is called an electrician. He said the main reason for supply to shut down was overloading.
- What is overloading?
- Is overloading and short the same? When does short-circuiting take place?
- How can the effects of overloading be avoided?
Concept: undefined >> undefined
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Give scientific reasons for the following:
Newton's gravitational law is the universal law of gravitation.
Concept: undefined >> undefined
Complete the given chemical equation:
\[\ce{Zn(s) + CuSO4(aq) -> \underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the type of reaction.
Concept: undefined >> undefined
Complete the chart below.
| F(N) | M1(kg) | M2(kg) | D(m) |
| (a) | 50 | 84 | 02 |
| 16 × 109 | 1.63 × 1022 | (b) | 34 |
Concept: undefined >> undefined
Observe the following diagram and answer the questions.
- Explain the construction of the equipment shown in the figure.
- How is AC generated?
Concept: undefined >> undefined
Write the answer to the questions with reference to the periodic table.
- What do (A), (B), (C), and (D) represent? [1]
- Elements are arranged in increasing order of their ______. [1]
- Write the electronic configuration of the first four elements in Group I. [1]
- What change in atomic radius is observed in moving from left to right in a Period? [1]
- Give a reason for (d). [1]
Concept: undefined >> undefined
Write the answer of the question with reference to laws of gravitation.
Write the value of the universal gravitational constant.
Concept: undefined >> undefined
1 kWh is equal to ______.
Concept: undefined >> undefined
Match the columns:
| Column ‘A’ | Column ‘B’ |
| Manganese | (a) Metal |
| (b) Non-metal | |
| (c) Transition metal |
Concept: undefined >> undefined
Answer the following questions in reference to the figure below:
- Which relation is shown in the figure?
- What will happen if the mass of one of the objects is doubled?
Concept: undefined >> undefined
In the electric equipment producing heat like iron, electric heater, boiler, toaster etc., an alloy such as nichrome is used, not pure metals.
Concept: undefined >> undefined
Answer the following questions related to the modern periodic table.
Name the blocks with the groups that they consist of.
Concept: undefined >> undefined
Answer the following questions related to the modern periodic table.
Which block elements are known as transition elements?
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Answer the following questions related to the modern periodic table.
How are elements placed around the zig-zag line in the p-block of the periodic table?
Concept: undefined >> undefined
How much heat energy is necessary to raise the temperature of 10 kg of water from 50°C to 100°C?
Concept: undefined >> undefined
Observe the figure and answer the questions:
- State Newton's universal law of gravitation.
- If the distance between the two bodies is tripled, how will the gravitational force between them change?
- What will happen to gravitational force, if mass of one of the object is doubled?
Concept: undefined >> undefined
Define Electric power.
Concept: undefined >> undefined
