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chapter 2 physics class 7D

  A. Multiple Choice Questions A motor van is running on a flyover. Its motion is (c) circular Incorrect. The correct answer is (a) rectilinear (since a flyover is typically straight, the motion is along a straight path). A stone falls freely from a cliff. Its motion is (a) translatory Correct. Free-fall motion is rectilinear translatory motion (a type of translatory motion). If equal distances are travelled by an object in equal intervals of time, its motion is said to be (a) uniform Correct. The SI unit of speed is (b) m/s Correct. Distance covered by a moving object in a unit time is called (c) speed Correct. Reeta runs through a distance of 10 km in 40 minutes. Her average speed is (b) 15 km/h B. Assertion-Reason Questions Assertion: Speedometer of a car measures the instantaneous speed of the car. Reason: Average speed is equal to the total distance covered by an object divided by the total time taken. (a) Both Assertion...
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কষে দেখি 9.1 class 10

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subject verb agreement class 7 D

  A. Complete these sentences with the correct verbs. The number of unemployed people has increased recently. The editor and the screen writer have not been paid yet. (Two separate people) Tom and Jerry is a famous cartoon show. (Single idea/title) The producer and director is waiting for you. (One person holding both titles) Watching movies is my favourite pastime. (Gerund subject) The rice and the dal are being cooked. (Two separate items) B. Complete these sentences with the correct forms of the verbs in brackets. Every man and woman has to understand their responsibility. (Rule 3: subjects preceded by every ) Either Mr Purab or Mr Tapan is going to be the new principal. (Rule 5: either...or with singular subjects) Each town and city in the region is participating in the survey. (Rule 3/4: each ) Neither swimming nor cycling interests me much – I like mountaineering. (Rule 5: singular subjects) Neither of the ideas was found good enough. (Rule 4: neither is singula...
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modal aux class 7 D

  Exercise A: Fill in the blanks with can, could, may, might or must. Could you please explain it again?' I said to the teacher. (Polite request) I have called all of you so that we can discuss the matter openly. (Ability/Possibility) You might want to try this dress. I think it will look good on you. (Suggestion/Possibility) Divya said that she might go to visit her old aunt the next day. (Past possibility) It is quite late. The shops must be closed by now. (Probability based on evidence) ' May I ask a question?' Tiya said, interrupting her friend. (Formal permission) He might be busy. He is not taking calls. (Possibility) 'I can complete the work in three days,' said Mahesh. (Ability) The wedding may have to be postponed. The bride is not well. (Possibility) You don't look well. You might want to take the day off. (Suggestion) Exercise B: Complete these sentences with will or shall. Our players will perform well tomorrow, I'm sure. (Future tense...
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chapter 2 CHEMISTRY class 7 D

  A. Choose the Correct Options 1.   A: Biogas is produced by decomposition of plant and animal waste (organic matter). B: Biogas is used as fuel to cook food. o     Answer : (c) Both A and B are chemical changes. §   Reason : Decomposition of organic matter (A) is a chemical change, and burning biogas (B) is also a chemical change (combustion). 2.   A change in which heat energy _______________ is called an endothermic change. o     Answer : (c) is absorbed 3.   A change that is useful for us is called a(n) _______________ change. o     Answer : (d) desirable 4.   _______________ is a chemical change. o     Answer : (b) Burning wood 5.   Ripening of fruits is a(n) _______________ change. o     Answer : (d) all of these (slow, irreversible, chemical) 6.   Amar has classified a few changes as given in the table. Which of them are classified incorrect...
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