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This is a Multiple Choice Questions as classified in NCERT Exemplar

B

In group 14, as we move down from C to Sn, the size increases and electronegativity decreases. This results in the decrease in M-M bond energy. Hence the catenation property decreases.

Bond energy is the amount of energy required to fragment the atoms combined in a molecule are born into separate atoms. Carbon has maximum bond energy as compared to its other group elements. Therefore, shows maximum catenation property.

This is a Multiple Choice Questions as classified in NCERT Exemplar

C

Boric acid is Lewis acid, having six electrons in its valence shell. It combines with water, accepts electrons

from OH⁻of water molecule and complete it octet to 8 and releases H⁺

Reaction: B (OH)₃ + OH − H→ [B (OH)₄]⁻ + H⁺

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This is a Multiple Choice Questions as classified in NCERT Exemplar

A

Number of items/molecules bonded to the central atom is termed as coordination number. In the given MF₆³⁻

Coordination number of metal is six and boron can have topmost coordination number of four as it consists of s and p orbital only and lacks d-orbital. Therefore, boron cannot be compared in the form of MF₆³⁻.

Cohesion refers to the way in which ideas in writing are linked together logically during IELTS exam. It involves the use of cohesive devices to ensure that the text flows smoothly, making it easier for readers to follow the argument or narrative.

This is a short answer type question as classified in NCERT Exemplar

Let b be the position vector of the centre of mass of a regular n-polygon.

(n-1) equal point masses are placed at (n-1) vertices of the regular n polygon, therefore for its centre of mass

r_CM= $\frac{\left(n-1\right)mb+ma}{\left(n-1\right)m+m}=0$

(n-1)mb+ma=0

B=- $\frac{a}{n-1}$

Here are ten common cohesive devices:

1. Conjunctions: e.g., "and," "but," "so"
2. Pronouns: e.g., "this," "that," "these"
3. Adverbial connectors: e.g., "however," "therefore"
4. Lexical ties: e.g., synonyms or related terms
5. Reference words: e.g., "the former," "the latter"
6. Substitution: replacing a word with another (e.g., using “do” instead of repeating a verb)
7. Ellipsis: omitting parts of a sentence that are understood from context
8. Repetition of key terms: reinforcing important concepts
9. Transition phrases: e.g., "in addition," "consequently"
10. Causal connectors: e.g., "because," "as a result"

The total fee structure for the BBA course at SRM School of Management includes multiple components, such tuition fees, hostel fees, application fees, admission fees, and other one-time charges. The total tuition fee for the course ranges from INR 2.3 Lacs to INR 2.5 lakh. Check out the other fee components in the table below:

The fee amount mentioned is sourced from the official website/sanctioning body and is subject to change. Therefore, it is indicative

This is a Multiple Choice Questions as classified in NCERT Exemplar

A

The B₂O₃ reacts with water to form boric acid hence it is an acidic oxide. As we move down the group electronegativity decreases and the tendency to donate electrons increases therefore basic character increases or acidic character decreases. So, from the given options, the most acidic oxide is B₂O₃.

Cohesion in IELTS writing is very important for making writing clear and easy to follow. It help connect ideas smooth. Here some way to use cohesion in IELTS writing:

• Use linking words and phrases like "however," "therefore," "in addition" to join sentences and paragraph.
• Use pronouns or same meaning words to not repeat and keep flow.
• Make essay with clear paragraph, each one with one idea that connect back to main point.

Yes, seats to UG and PG programmes at KIT College of Engineering are offered through CET counselling process. Students who qualify for the relevant entrance exams must participate in state-level counselling process to choose KIT College of Engineering.

This is a Multiple Choice Questions as classified in NCERT Exemplar

A

Central atom in [B (OH)₄ ]⁻ no lone pair. Electronic conf In ground state: 1s² 2s² 2px¹ 2py⁰ 2pz⁰

In excited state, One Electron from 2s shifts to 2py  orbital and the configuration becomes:

1s² 2s² 2p¹ x² p¹ y² pz⁰ 

Now, one s and three p orbitals combined to give sp³ hybridisation and tetrahedral shape.

This is a short answer type question as classified in NCERT Exemplar

Where weight of the door acts along negative y axis

A force can produce torque only along a direction normal to itself as $\tau =r\times F$ . So when the door is in the xy plane the torque produced by gravity can only along z direction. Never about an axis passing through y direction. Hence the weight will not produce any torque.

This is a Multiple Choice Questions as classified in NCERT Exemplar

A

Lewis acids are the species in which the state is not complete and ready to accept electrons. Because Al is surrounded by 6 electrons in AlCl₃ and all three Cl atoms are surrounded by 8 electrons, AlCl₃ is an electron acceptor. It is a covalent compound.

This is a short answer type question as classified in NCERT Exemplar

Wheel is a rigid body. The particles that constitute the wheel do experience a centripetal acceleration directed towards the centre. This acceleration arises due to internal elastic forces which cancel out in pairs.

In a half wheel the distribution of mass about its centre of mass is not symmetrical, therefore the direction of angular momentum of the wheel does not coincide with the direction of its angular velocity. Hence an external torque is required to maintain the motion of the wheel.

This is a Multiple Choice Questions as classified in NCERT Exemplar

C

Gallium generally exists as solid at room temperature but melts on slight heating (melting point: 20^? C ).

Whereas the boiling point of Gallium is very high around 2400^? C. Gallium has large cohesive forces that hold its structure together and it is stable for a wide range of temperatures and can be used for measuring high temperatures.

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