IIT JEE Practice Question and Answer
8Q: Which of the following is not a pure substance? 2141 05b5cc6a8e4d2b4197774ce57
5b5cc6a8e4d2b4197774ce57- 1Oxygenfalse
- 2Carbon dioxidefalse
- 3Waterfalse
- 4Milktrue
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Answer : 4. "Milk"
Explanation :
Answer: D) Milk Explanation: Milk is not a pure substance since it has so many constituents that can be separated physically. Compounds are pure substances formed from elements unlike mixtures.
Q: A man saves Rs. 200 in each of the first three months of his service. In each of the subsequent months his saving increases by Rs. 40 more than the saving of immediately previous month. His total saving from the start of service will be Rs. 11040 after ? 2140 05b5cc71ee4d2b4197774f5b8
5b5cc71ee4d2b4197774f5b8- 119 monthsfalse
- 221 monthstrue
- 318 monthsfalse
- 420 monthsfalse
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Answer : 2. "21 months"
Explanation :
Answer: B) 21 months Explanation: Total savings = 200 + 200 + 200 + 240 + 280 + ... to n months = 11040 = 120 + 80 + 160 + 40 + 200 + 240 + ....n terms= 40 + 80 + 120 + 160 + 200 + 240 + ...n terms= n/2[2a + (n-1)d] + 80 + 40 = 11040= n/2[240 + (n-1)40] = 10920= n[6+n-1] = 546= n[n+5] = 546n = 21
Q: Where are the Macronutrients located on a Nutritional Label? 2138 05b5cc6afe4d2b4197774d1dd
5b5cc6afe4d2b4197774d1dd- 1On the Toptrue
- 2On the Rightfalse
- 3On the Bottomfalse
- 4On the Leftfalse
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Answer : 1. "On the Top"
Explanation :
Answer: A) On the Top Explanation: Macronutrients are located on the Top of a Nutritional Label. Macronutrients are essential substances that the body needs to survive and develop. There are 3 main Macronutrients: 1. Fats 2. Proteins (and) 3. Carbohydrates. The nutritional label is an important part of any food package. Since the Macronutrients refer to a list of nutrients that we need daily in a pretty large amount are the most important nutrients to sustain our living, commonly they are written on the top of the Nutrition Labels.
Q: If (2a + 3b)/(5a - 3b) = 23/5 , then the value of ba is ? 2138 05b5cc761e4d2b4197774fd39
5b5cc761e4d2b4197774fd39- 15false
- 24false
- 320true
- 428false
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Answer : 3. "20"
Explanation :
Answer: C) 20 Explanation: Given (2a + 3b)/(5a - 3b) = 23/5 => 10a + 15b = 115a - 69b=> 105a = 84b => 5a = 4b a/b = 4/5 => a=4 & b=5=> bxa = 5x4 = 20.
Q: I have four wings, but cannot fly, I never laugh and never cry; On the same spot I'm always found, toiling away with little sound. What am I? 2138 05b5cc611e4d2b4197774b66f
5b5cc611e4d2b4197774b66f- Show AnswerHide Answer
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Answer :
Explanation :
A Windmill.
Q: A decision committee of 5 members is to be formed out of 4 Actors, 3 Directors and 2 Producers. In how many ways a committee of 2 Actors, 2 Directors and 1 Producer can be formed ? 2138 05b5cc6b6e4d2b4197774d572
5b5cc6b6e4d2b4197774d572- 118false
- 224false
- 336true
- 432false
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Answer : 3. "36"
Explanation :
Answer: C) 36 Explanation: Required Number of ways = 4C2 × 3C2 × 2C1 = 36 = 36
Q: What has to be broken before you can use or eat it? 2137 05b5cc645e4d2b4197774bbf0
5b5cc645e4d2b4197774bbf0- Show AnswerHide Answer
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Answer :
Explanation :
Egg. Egg is to be broken if we want to use or eat it.
Q: The Peacock Throne was a famous jeweled throne that was the seat of the ________ emperors of India. 2137 05b5cc6b7e4d2b4197774d61a
5b5cc6b7e4d2b4197774d61a- 1Mughaltrue
- 2Mauryafalse
- 3Guptafalse
- 4Marathafalse
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Answer : 1. "Mughal"
Explanation :
Answer: A) Mughal Explanation: The Peacock Throne was a famous jeweled throne that was the seat of the Mughal emperors of India. It was commissioned in the early 17th century by emperor Shah Jahan and was located in the Red Fort of Delhi.