Two circles intersect at two points B and C. Through B, two line segments ABD and PBQ are drawn to intersect the circles at A, D and p,q respectively (see the figure).prove that angle ACP =angle QCD.prove that a cyclic parallelogram is a rectangle​

Answer:

The correct option is b. Tollen's reagent or the silver mirror test can distinguish 2-pentyne and 1-pentyne.

Explanation:

Answer:

Tollens' reagent will be able to distinguish between 1- pentyne and 2- pentyne.

Explanation:

Tollens' reagent: a solution of silver nitrate and ammonia (Ag(NH₃)₂OH), and its test is known as Tollens' test or silver mirror test.

In 1-pentyne, CH₃-CH₂-CH₂-C≡CH, the terminal C≡C bond has acidic hydrogen (H⁺) . When the reagent is added, the acidic hydrogen (H⁺) is replaced by Ag⁺, giving a white precipitate.

CH₃-CH₂-CH₂-C≡CH + [Ag(NH₃)₂]⁺ → CH₃-CH₂-CH₂-C≡CAg + NH₃ + NH₄⁺

In 2-pentyne, CH₃-CH₂-C≡C-CH₃, the C≡C bond is present in the middle of the chain and has no acidic hydrogen attached to it, hence it does not give the silver mirror test.

CH₃-CH₂-C≡C-CH₃ + [Ag(NH₃)₂]⁺ → NO REACTION

Conclusion:

Tollens' test is given by 1-pentyne only.

the answer is

Consider Planet X has n moons. The data of one of the moons is given; the time period is 9 hours 39 minutes, and orbital radius is 11.4

x103 km. Find the mass of the planet.

Ops: A. O 8.26 x 1022 kg

B. O 7.26 x 1021 kg

C. O 7.26 x 1023 Kg

D. 09.26 x 1023 kg

Answer:

Explanation:

The benefits the Cloud provide to start-up companies without access to large funding are mentioned as follows:-

• Companies can lower their capital expenditure by using the cloud because they only have to pay for the resources they utilise. Given that startups frequently have minimal resources, this is a significant advantage.
• The cloud may also help startups sell their products more quickly, which is another perk. In the past, businesses would have to invest a significant amount of time and money in building their infrastructure.
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#SPJ 2

Answer:

Speech on Importance of wearing mask.

Explanation:

Good morning, all my dear friends, teachers and respected principal. I am Sunidhi Birla and I am here to tell you about wearing a face mask.

As we all know during COVID-19 wearing mask had help us to be safe and keep away all kind of germs from us. Universal mask use can significantly reduce virus transmission in communities. Mask are not perfect barriers to transmission and should be combined with other preventative measure such as social distancing and contact tracing. The primary role of face mask is to prevent the transmission of SARS-CoV-2 via respiratory droplets, which can easily enter through the mouth and nose to infect new hosts.

One major benefit of wearing face mask is to protect the people around you, especially if you have been exposed to someone carrying the virus or work in a crowded place.

Not only viruses but face mask helps in avoiding to go dust through nostrils. There are many benefits of using face mask.

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Learn more about this topic on:

https://brainly.in/question/50639185

A speech Mask for Safety

Good morning one and all present over here, I am Rishabh from class 10th would like to give a speech on a very important topic that is "Mask for safety."

We know very well that from last two years we have been facing lot of issues due to Corona Pandemic. It is very important to wear a mask in public place to keep ourself safe and others. Mask helps us to prevent the  transmission of viruses. It is the responsibility of youngsters that though the impact of Corona virus has been reduced but still we should spread the awareness among the people that wearing mask is always good for health to avoid any respiratory issues.

It is said that prevention  is always better than cure, so it is better that we should use mask to avoid any kind of virus to  go into our lungs and which create the problem in future.

I am ending my speech by saying that wear mask and be safe, our safety in our hand. Thank you very much for patience listening.

To know more about speech writing visit the following links-

https://brainly.in/question/31417480?

https://brainly.in/question/54229542?

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Explanation: