यह सवाल अच्छा है।

यह means this. It points to something near the speaker, so यह सवाल means this question.

A useful contrast is:

• यह = this
• वह = that

In everyday speech, यह is often pronounced more like ये, even when it is written as यह.

Hindi often allows more than one natural word order here.

Both of these are normal:

• यह सवाल अच्छा है = This question is good
• यह अच्छा सवाल है = This is a good question

The first structure focuses on the question and then says something about it. The second structure groups अच्छा सवाल together more tightly as a good question.

So the sentence you have is a very common and natural way to say This question is good.

Because सवाल is a masculine singular noun, the adjective agrees with it.

So:

• masculine singular: अच्छा
• feminine singular: अच्छी
• masculine plural: अच्छे

Since सवाल is masculine singular, you get अच्छा सवाल.

For comparison:

• यह सवाल अच्छा है। = This question is good.
• यह किताब अच्छी है। = This book is good.

Here किताब is feminine, so अच्छी is used instead.

Yes, सवाल is masculine.

Unfortunately, in Hindi, you often have to learn noun gender along with the word. Sometimes the ending gives you a clue, but not always. सवाल is one of those words you should simply memorize as masculine.

That is why it takes:

• अच्छा सवाल
• बड़ा सवाल
• मुश्किल सवाल

with masculine forms of adjectives when needed.

है means is. It is the present-tense form of the verb to be for singular subjects.

So the sentence structure is basically:

• यह सवाल = this question
• अच्छा = good
• है = is

Together: This question is good.

In very casual speech, Hindi speakers sometimes drop है, especially in conversation, but in standard full sentences it is normally included.

Hindi does not use articles like English a, an, and the.

So सवाल can mean:

• a question
• the question
• just question

depending on context.

In this sentence, यह already specifies the noun, so यह सवाल clearly means this question.

A common approximate pronunciation is:

yuh savaal achchhaa hai

A few notes:

• यह is often said like yuh or yeh
• सवाल has a long aa sound: sa-vaal
• अच्छा has a doubled ch sound: ach-chhaa
• है is often pronounced like hai with a sound similar to high, though exact pronunciation varies by accent

A natural spoken rhythm is:

yuh sa-vaal ach-chhaa hai

सवाल is very common in everyday Hindi and sounds natural in normal conversation.

प्रश्न also means question, but it is more formal, bookish, or academic.

So:

• यह सवाल अच्छा है। = natural, everyday
• यह प्रश्न अच्छा है। = more formal

A learner will hear सवाल very often in spoken Hindi.

Not exactly in the same way English uses pronouns, but Hindi often uses demonstratives like यह and वह where English would use he, she, it, this, or that, depending on context.

So यह can sometimes refer to a nearby person or thing, and in context it may translate as:

• this
• he
• she
• it

But in यह सवाल, it clearly means this, because it is directly modifying the noun सवाल.

In everyday speech, many speakers pronounce यह as ये, so you may hear something that sounds like ये सवाल अच्छा है.

But in standard written Hindi, there is an important distinction:

• यह = this, singular
• ये = these, plural, or a polite/oblique-related form in other contexts

So for a learner, the safest standard written version here is:

यह सवाल अच्छा है।

Just be aware that spoken Hindi often blurs this difference.

Here, अच्छा means good.

But अच्छा is a very flexible and common Hindi word. Depending on context, it can also mean things like:

• good
• nice
• fine
• okay
• I see
• really?

In your sentence, though, it is simply an adjective describing सवाल, so the meaning is straightforward: good.

Yes. If you want to say These questions are good, you would say:

ये सवाल अच्छे हैं।

Notice the changes:

• यह → ये
• अच्छा → अच्छे
• है → हैं

That is because the noun phrase is now plural.

So the pattern is:

• singular: यह सवाल अच्छा है।
• plural: ये सवाल अच्छे हैं।