IIT JEE Practice Question and Answer
8Q: The New Chief Minister of Himachal Pradesh 2017? 1608 05b5cc6b9e4d2b4197774d739
5b5cc6b9e4d2b4197774d739- 1Anil Sharmafalse
- 2Jairam Thakurtrue
- 3Sudhir Sharmafalse
- 4Karan Singhfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Jairam Thakur"
Explanation :
Answer: B) Jairam Thakur Explanation: Jairam Thakur was sworn-in as the Chief Minister of Himachal Pradesh on 27th December 2017 after virbhadra Singh. The cabinet, including Thakur, were administered the oath of office and secrecy by Governor Acharya Dev Vrat at the historic Ridge Ground in Shimla, the capital city of Himachal Pradesh. Jai Ram is the first chief minister from the second largest Mandi district and the 14th chief minister and sixth person to adorn the office of the chief minister.
Q: Which combination of atoms can form a polar covalent bond? 1608 05b5cc699e4d2b4197774c68c
5b5cc699e4d2b4197774c68c- 1H and Brtrue
- 2H and Hfalse
- 3Na and Brfalse
- 4N and Nfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "H and Br"
Explanation :
Answer: A) H and Br Explanation: Only H and Br form Polar Covalent Bond. Covalent bonding: Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability. 1. Polar Covalent Bond 2. Nonpolar Covalent Bond 1. Polar Covalent Bond: A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with. The atom with the higher electronegativity will have a stronger pull for electrons (Similiar to a Tug-O-War game, whoever is stronger usually wins). As a result, the shared electrons will be closer to the atom with the higher electronegativity, making it unequally shared. 2. Nonpolar Covalent Bond: A Nonpolar Covalent Bond is created when atoms share their electrons equally. This usually occurs when two atoms have similar or the same electron affinity. The closer the values of their electron affinity, the stronger the attraction. This occurs in gas molecules; also known as diatomic elements. Nonpolar covalent bonds have a similar concept as polar covalent bonds; the atom with the higher electronegativity will draw away the electron from the weaker one. Here H and H and N and N form Non-polar covalent bonds. Na and Br form the ionic bond.
Q: Logic Challenge 1608 05b5cc6d5e4d2b4197774e62e
5b5cc6d5e4d2b4197774e62e- 140false
- 220false
- 32true
- 436false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "2"
Explanation :
Answer: C) 2 Explanation: In the starting it is given that Couple went to the movie and No other went with them. So total members went to movie is only 2.
Q: To buy goods on credit means to 1607 05b5cc666e4d2b4197774bec6
5b5cc666e4d2b4197774bec6- 1promise to pay for goods later.true
- 2pay only a discount price.false
- 3promise to pay only a sale price.false
- 4pay cash for goods.false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "promise to pay for goods later."
Explanation :
Answer: A) promise to pay for goods later. Explanation: If as a business, you buy goods or services on credit from a supplier (accounts payable) then the supplier will supply the goods and business will incur a liability to the supplier for that amount, but no cash will change hands at that stage. Some of those shop keepers allowed regular "trustworthy" customers to purchase items without having the full payment. Hence, Buying on credit means that no actual money has changed hands.
Q: Highest Jute producing state in India? 1607 05b5cc6a3e4d2b4197774cc0a
5b5cc6a3e4d2b4197774cc0a- 1Gujaratfalse
- 2West Bengaltrue
- 3Uttar Pradeshfalse
- 4Biharfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "West Bengal"
Explanation :
Answer: B) West Bengal Explanation: West Bengal is the highest Jute producing state in India followed by Bihar and Assam in second and third place. Gujarat is the largest Cotton producing state in India.
Q: Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ? 1607 05b5cc6e7e4d2b4197774edb5
5b5cc6e7e4d2b4197774edb5- 185 minfalse
- 295 minfalse
- 3105 minfalse
- 4100 mintrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "100 min"
Explanation :
Answer: D) 100 min Explanation: Work done by the third pipe in 1 min = 1/50 - (1/60 + 1/75) = - 1/100.[-ve sign means emptying] The third pipe alone can empty the cistern in 100 min.
Q: Which of the following chemical compounds has the highest boiling point? 1607 05b5cc6b5e4d2b4197774d52a
5b5cc6b5e4d2b4197774d52a- 1Dimethyl ether (CH3OCH3)false
- 2Methanol (CH3OH)true
- 3Methane (CH4)false
- 4Nonefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Methanol (CH3OH)"
Explanation :
Answer: B) Methanol (CH3OH) Explanation: Chemical Compounds with stronger intermolecular forces have higher boiling points. The order of strengths of intermolecular forces is: London dispersion < dipole-dipole < H-bonding Methane (CH4) — London dispersion forces Dimethyl ether (CH3OCH3) — dipole-dipole attractions Methanol (CH3OH) — hydrogen bonding Therefore, Methanol - CH3OH with H-Bonding have highest Boiling Point among the given chemical compounds.
Q: Light Year is related to 1607 05b5cc6b7e4d2b4197774d601
5b5cc6b7e4d2b4197774d601- 1Distancetrue
- 2Accelerationfalse
- 3Velocityfalse
- 4Intensity of Lightfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Distance"
Explanation :
Answer: A) Distance Explanation: Light Year is related to Distance. It is the unit of Distance. It is about 9.5 Trillion Kms or 5.9 Trillion miles. It is the distance that light travels in vaccum in one julian year i.e, 365.25 days.

