IIT JEE Practice Question and Answer
8Q: What process never occurs in interphase? 1282 05b5cc62ae4d2b4197774b8c7
5b5cc62ae4d2b4197774b8c7- Show AnswerHide Answer
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Answer :
Explanation :
Absence of cell division is the process that never comes in interphase.
Q: abcdefghijklmnopqrstuvwxyz Riddle What sentence contains all abcdefghijklmnopqrstuvwxyz? 1281 05b5cc6a8e4d2b4197774ce85
5b5cc6a8e4d2b4197774ce85- Show AnswerHide Answer
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Answer :
Explanation :
The Quick Brown Fox Jumped Over The Lazy Dog is the sentence which contains all 26 alphabets i.e, from a to z.
Q: Which is an example of Phototropism? 1281 05b5cc6abe4d2b4197774cfd6
5b5cc6abe4d2b4197774cfd6- 1roots of a plant following waterfalse
- 2plant bending toward the lighttrue
- 3roots growing into the soilfalse
- 4a venus flytrap capturing a flyfalse
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Answer : 2. "plant bending toward the light"
Explanation :
Answer: B) plant bending toward the light Explanation: Phototropism is the ability of a photosynthesizing organism, to grow directionally in response to a light source. It is very common in plants, but can also occur in other organisms such as fungi. Example :: Sunflower
Q: Two parallel chords on the same side of the centre of a circle are 5 cm apart. If the chords are 20 and 28 cm long, what is the radius of the circle? 1281 05b5cc73ae4d2b4197774f8f7
5b5cc73ae4d2b4197774f8f7- 114.69 cmfalse
- 215.69 cmtrue
- 318.65 cmfalse
- 416.42 cmfalse
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Answer : 2. "15.69 cm"
Explanation :
Answer: B) 15.69 cm Explanation: Draw the two chords as shown in the figure. Let O be the center of the circle. Draw OC perpendicular to both chords. That divides the two chords in half.So CD = 10 and AB = 14. Draw radii OA and OD, both equal to radius r.We are given that BC = 5, the distance between the two chords. LetOB = x. We use the Pythagorean theorem on right triangle ABO AO² = AB² + OB² r² = 14² + x² We use the Pythagorean theorem on right triangle DCO DO² = CD² + OC² We see that OC = OB+BC = x+5, so r² = 10² + (x+5)² So we have a system of two equations: r² = 14² + x² r² = 10² + (x+5)² Since both left sides equal r², set the right sidesequal to each other. 14² + x² = 10² + (x+5)² 196 + x² = 100 + x² + 10x + 25 196 = 125 + 10x 71 = 10x 7.1 = x r² = 14² + x² r² = 196 + (7.1)² r² = 196 + 50.41 r² = 246.41 r = √246.41 r = 15.69745202 cm
Q: Plants are photosynthetic autotrophs. What does this mean? 1279 05b5cc662e4d2b4197774be95
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Answer :
Explanation :
Plants are photosynthetic autotrophs, which means that they are able to produce their own food through the process called photosynthesis. In photosynthesis, plants use light, water, and carbon dioxide to create glucose, which they convert to cellulose and use to make new cells. Hence, that is why, Plants are called photosynthetic autotrophs.
Q: Number Challenge Puzzle ? 1279 05b5cc6d3e4d2b4197774e4be
5b5cc6d3e4d2b4197774e4be- 11true
- 24false
- 35false
- 40false
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Answer : 1. "1"
Explanation :
Answer: A) 1 Explanation: In each row, Sum of 1st two digit number + last two digit number = Middle two digit number i.e., 1st row 15 + 40 = 55 2nd row 46 + 47 = 93 Similarly, 7x + 16 = 87 => x = 1.
Q: Microbial Type Culture Collection Centre is situated at 1279 05b5cc62ae4d2b4197774b8cd
5b5cc62ae4d2b4197774b8cd- 1Chandigarhtrue
- 2New Delhifalse
- 3Hyderabadfalse
- 4Bangalorefalse
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Answer : 1. "Chandigarh"
Explanation :
Answer: A) Chandigarh Explanation:
Q: Which of the following elements has the lowest electronegativity 1278 05b5cc636e4d2b4197774ba4d
5b5cc636e4d2b4197774ba4d- 1Brominefalse
- 2Fluorinefalse
- 3Carbonfalse
- 4Lithiumtrue
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Answer : 4. "Lithium"
Explanation :
Answer: D) Lithium Explanation: Electronegativity is the tendency for an atom to attract electrons. There are general trends on the periodic table which you can use to determine the relative electronegativity for different elements, but otherwise you can also look at their valence shell and effective nuclear charge to determine their relative electronegativity. Here from the given options, Lithium has least tendency to attract electrons and thus has a lower electronegativity.

